The diamondback terrapin or simply terrapin (''Malaclemys terrapin'') is a
species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
of
turtle
Turtles are an order of reptiles known as Testudines, characterized by a special shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Cryptodira (hidden necked tu ...
native to the
brackish
Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...
coastal tidal marshes of the Northeastern and southern United States, and in
Bermuda
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, anthem = "God Save the King"
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.
It belongs to the
monotypic
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...
genus ''Malaclemys''. It has one of the largest ranges of all turtles in North America, stretching as far south as the
Florida Keys
The Florida Keys are a coral cay archipelago located off the southern coast of Florida, forming the southernmost part of the continental United States. They begin at the southeastern coast of the Florida peninsula, about south of Miami, and e ...
and as far north as
Cape Cod
Cape Cod is a peninsula extending into the Atlantic Ocean from the southeastern corner of mainland Massachusetts, in the northeastern United States. Its historic, maritime character and ample beaches attract heavy tourism during the summer mont ...
.
The name "terrapin" is derived from the
Algonquian word .
It applies to ''Malaclemys terrapin'' in both
British English
British English (BrE, en-GB, or BE) is, according to Lexico, Oxford Dictionaries, "English language, English as used in Great Britain, as distinct from that used elsewhere". More narrowly, it can refer specifically to the English language in ...
and
American English
American English, sometimes called United States English or U.S. English, is the set of variety (linguistics), varieties of the English language native to the United States. English is the Languages of the United States, most widely spoken lan ...
. The name originally was used by early European settlers in North America to describe these brackish-water turtles that inhabited neither freshwater habitats nor the sea. It retains this primary meaning in American English.
In British English, however, other semi-aquatic turtle species, such as the
red-eared slider
The red-eared slider or red-eared terrapin (''Trachemys scripta elegans'') is a subspecies of the pond slider (''Trachemys scripta''), a semiaquatic turtle belonging to the family Emydidae. It is the most popular pet turtle in the United States, ...
, might also be called terrapins.
Description
![Diamondback turtle adult female](https://upload.wikimedia.org/wikipedia/commons/4/49/Diamondback_turtle_adult_female.jpg)
The common name refers to the diamond pattern on top of its shell (carapace), but the overall pattern and coloration vary greatly. The shell is usually wider at the back than in the front, and from above it appears wedge-shaped. The shell coloring can vary from brown to grey, and its body color can be grey, brown, yellow, or white. All have a unique pattern of wiggly, black markings or spots on their body and head. The diamondback terrapin has large webbed feet.
The species is
sexually dimorphic
Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most ani ...
in that the males grow to a carapace length of approximately , while the females grow to an average carapace length of around , though they are capable of growing larger. The largest female on record was just over in carapace length. Specimens from regions that are consistently warmer in temperature tend to be larger than those from cooler, more northern areas. Male diamondback terrapins weigh on average, while females weigh around . The largest females can weigh up to .
Adaptations to their environment
Terrapins look much like their freshwater relatives, but are well adapted to the near shore marine environment. They have several adaptations that allow them to survive in varying salinities. They can live in full strength salt water for extended periods, and their skin is largely impermeable to salt. Terrapins have lachrymal salt glands, not present in their relatives, which are used primarily when the turtle is dehydrated. They can distinguish between drinking water of different salinities.
Terrapins also exhibit unusual and sophisticated behavior to obtain fresh water, including drinking the freshwater surface layer that can accumulate on top of salt water during rainfall and raising their heads into the air with mouths open to catch falling rain drops.
Terrapins are strong swimmers. They have strongly webbed hind feet, but not flippers like
sea turtles
Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, are reptiles of the order Testudines and of the suborder Cryptodira. The seven existing species of sea turtles are the flatback, green, hawksbill, leatherback, loggerhead, ...
do . Like their relatives (''
Graptemys
''Graptemys'' is a genus of freshwater turtles containing 14 species, commonly known as map turtles. Crother, B. I. (editor) (2017). Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, with Comments ...
''), they have strong jaws for crushing shells of prey, such as clams and snails. This is especially true of females, who have larger and more muscular jaws than males.
Subspecies
Seven subspecies are recognized, including the
nominate race
In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...
.
*''M. t. centrata'' (
Latreille, 1801) – Carolina diamondback terrapin (Georgia, Florida, North Carolina, South Carolina)
*''M. t. littoralis'' (
Hay
Hay is grass, legumes, or other herbaceous plants that have been cut and dried to be stored for use as animal fodder, either for large grazing animals raised as livestock, such as cattle, horses, goats, and sheep, or for smaller domesticated ...
, 1904) – Texas diamondback terrapin (Texas)
[
*''M. t. macrospilota'' (Hay, 1904) – ornate diamondback terrapin (Florida) ][
*''M. t. pileata'' ( Wied, 1865) – Mississippi diamondback terrapin (Alabama, Florida, Louisiana, Mississippi, Texas)][
*''M. t. rhizophorarum'' Fowler, 1906 – mangrove diamondback terrapin (Florida)][
*''M. t. tequesta'' Schwartz, 1955 – East Florida diamondback terrapin (Florida)][
*''M. t. terrapin'' ( Schoepff, 1793) – northern diamondback terrapin (Connecticut, Delaware, Maryland, Massachusetts, New Jersey, New York, North Carolina, Rhode Island, Virginia)]
The isolated Bermuda
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, anthem = "God Save the King"
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n population, which arrived in Bermuda on its own rather than being introduced by humans, has not yet been officially assigned to a subspecies but, based on mtDNA
Mitochondrial DNA (mtDNA or mDNA) is the DNA located in mitochondria, cellular organelles within eukaryotic cells that convert chemical energy from food into a form that cells can use, such as adenosine triphosphate (ATP). Mitochondrial DNA ...
, it is closely related to the population from the Carolinas.
Distribution and habitat
Diamondback terrapins live in the very narrow strip of coastal habitats on the Atlantic and Gulf Coasts of the United States, from as far north as Cape Cod
Cape Cod is a peninsula extending into the Atlantic Ocean from the southeastern corner of mainland Massachusetts, in the northeastern United States. Its historic, maritime character and ample beaches attract heavy tourism during the summer mont ...
, , to the southern tip of Florida
Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...
and around the Gulf Coast
The Gulf Coast of the United States, also known as the Gulf South, is the coastline along the Southern United States where they meet the Gulf of Mexico. The coastal states that have a shoreline on the Gulf of Mexico are Texas, Louisiana, Mississ ...
to Texas
Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...
. In most of their range, terrapins live in ''Spartina
''Spartina'' is a taxon of plants in the grass family, frequently found in coastal salt marshes. Its species are commonly known as cordgrass or cord-grass, and are native to the coasts of the Atlantic Ocean in western and southern Europe, north ...
'' marshes that are flooded at high tide, but in Florida they also live in mangrove swamps. This turtle can survive in freshwater as well as full-strength ocean water, but adults prefer intermediate salinities. Despite its preference for salt water, it is not a true sea turtle
Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, are reptiles of the order Testudines and of the suborder Cryptodira. The seven existing species of sea turtles are the flatback, green, hawksbill, leatherback, loggerhead, ...
and is not fully marine. They have no competition from other turtles, although common snapping turtle
The common snapping turtle (''Chelydra serpentina'') is a species of large freshwater turtle in the family Chelydridae. Its natural range extends from southeastern Canada, southwest to the edge of the Rocky Mountains, as far east as Nova Scotia ...
s do occasionally make use of salty marshes. It is unclear why terrapins do not inhabit the upper reaches of rivers within their range, as in captivity they tolerate fresh water. It is possible they are limited by the distribution of their prey. Terrapins live quite close to shore, unlike sea turtle
Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, are reptiles of the order Testudines and of the suborder Cryptodira. The seven existing species of sea turtles are the flatback, green, hawksbill, leatherback, loggerhead, ...
s, which wander far out to sea; however, a population of terrapins on Bermuda
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, anthem = "God Save the King"
, song_type = National song
, song = " Hail to Bermuda"
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has been determined to be self-established rather than introduced by humans. Terrapins tend to live in the same areas for most or all of their lives, and do not make long-distance migrations.
Life cycle
Adult diamondback terrapins mate in the early spring, and clutches of 4–22 eggs
Humans and human ancestors have scavenged and eaten animal eggs for millions of years. Humans in Southeast Asia had domesticated chickens and harvested their eggs for food by 1,500 BCE. The most widely consumed eggs are those of fowl, especial ...
are laid in sand dune
A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, f ...
s in the early summer. They hatch in late summer or early fall. Maturity in males is reached in 2–3 years at around in length; it takes longer for females: 6–7 years (8–10 years for northern diamondback terrapins) at a length of around .
Reproduction
Like all reptiles, terrapin fertilization occurs internally. Courtship has been seen in May and June, and is similar to that of the closely related red-eared slider (''Trachemys scripta
The pond slider (''Trachemys scripta'') is a species of common, medium-sized, semiaquatic turtle. Three subspecies are described, the most recognizable of which is the red-eared slider (''T. s. elegans''), which is popular in the pet trade and ha ...
''). Female terrapins can mate with multiple males and store sperm for years, resulting in some clutches of eggs with more than one father.
Like many turtles, terrapins have temperature dependent sex determination, meaning that the sex of hatchlings is the result of incubation temperature. Females can lay up to three clutches of eggs/year in the wild, and up to five clutches/year in captivity. It is not known how often they may skip reproduction, so true clutch frequency is unknown.
Females may wander considerable distances on land before nesting. Nests are usually laid in sand dunes or scrub vegetation near the ocean in June and July, but nesting may start as early as late April in Florida. Females will quickly abandon a nest attempt if they are disturbed while nesting. Clutch sizes vary latitudinally, with average clutch sizes as low as 5.8/eggs/clutch in southern Florida to 10.9 in New York. After covering the nest, terrapins quickly return to the ocean and do not return except to nest again.
The eggs usually hatch in 60–85 days, depending on the temperature and the depth of the nest. Hatchlings usually emerge from the nest in August and September, but may overwinter in the nest after hatching. Nest predation is a large threat to Diamondback Terrapins. A study was done on 3159 nests finding that the greatest predator was racoons and predated nests were completely emptied of egg. Hatchlings sometimes stay on land in the nesting areas in both fall and spring and they may remain terrestrial for much or all of the winter in some places. Hatchling terrapins are freeze tolerant, which may facilitate overwintering on land. Hatchlings have lower salt tolerance than adults and Gibbons et al. provided strong evidence that one- and two-year-old terrapins use different habitats than do old individuals.
Growth rates, age of maturity, and maximum age are not well known for terrapins in the wild, but males reach sexual maturity before females because of their smaller adult size. In females at least, sexual maturity is dependent on size rather than age. Estimations of age based on counts of growth rings on the shell are as yet untested, so it is not clear how to determine the ages of wild terrapins.
Seasonal activities
Because nesting is the only terrapin activity that occurs on land, most other aspects of terrapin behavior are poorly known. Limited data suggest that terrapins hibernate in the colder months in most of their range, in the mud of creeks and marshes.
Diet
The diamondback terrapin typically feeds on fish
Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of li ...
, crustaceans (such as shrimp
Shrimp are crustaceans (a form of shellfish) with elongated bodies and a primarily swimming mode of locomotion – most commonly Caridea and Dendrobranchiata of the decapod order, although some crustaceans outside of this order are refer ...
and crabs
Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the ...
) marine worms
Any worm that lives in a marine environment is considered a marine worm. Marine worms are found in several different phyla, including the Platyhelminthes, Nematoda, Annelida (segmented worms), Chaetognatha, Hemichordata, and Phoronida. For a ...
, marine snails (especially the saltmarsh periwinkle
), clam
Clam is a common name for several kinds of bivalve molluscs. The word is often applied only to those that are edible and live as infauna, spending most of their lives halfway buried in the sand of the seafloor or riverbeds. Clams have two she ...
s, barnacles
A barnacle is a type of arthropod constituting the subclass Cirripedia in the subphylum Crustacea, and is hence related to crabs and lobsters. Barnacles are exclusively marine, and tend to live in shallow and tidal waters, typically in erosive ...
, mussel
Mussel () is the common name used for members of several families of bivalve molluscs, from saltwater and Freshwater bivalve, freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other ...
s, other mollusks
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ...
, insects, carrion, and sometimes ingest small amounts of plant material, such as algae. At high densities the terrapin may eat enough invertebrates to have ecosystem-level effects, partially because periwinkles themselves can overgraze important marsh plants, such as cordgrass
''Spartina'' is a taxon of plants in the grass family, frequently found in coastal salt marshes. Its species are commonly known as cordgrass or cord-grass, and are native to the coasts of the Atlantic Ocean in western and southern Europe, north ...
(''Spartina alterniflora''). Gender and age can greatly affect the diet of the diamondback terrapin, males and juvenile females tend to have less diversity in their diet. Adult females, due to their powerful, defined jaw, will occasionally feed on crustaceans such as crabs and are more likely to consume hard-shelled mollusks.
Conservation
Status
In the 1900s, the species was once considered a delicacy to eat and was hunted almost to extinction
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...
. The population also decreased due to the development of coastal areas, terrapins being susceptible to wounds from the propellers on motorboats.
Another common cause of death is the trapping of the turtles in recreational crab trap
Crab traps are used to bait, lure, and catch crabs for commercial or recreational use. Crabbing or crab fishing is the recreational hobby and commercial occupation of fishing for crabs. Different types of traps are used depending on the type of ...
s, as the turtles are attracted to the same bait as the crabs. The Wetlands Institute
The Wetlands Institute is a non-profit organization started in 1969 by the executive director of WWF, Herbert Mills. The Wetlands Institute sits on 6,000 acres (24 km²) of protected wetlands in Stone Harbor, New Jersey. It hosts educational tour ...
estimates that a minimum of 14,000 to 15,000 terrapins drown in crab traps annually set along the New Jersey coast alone. Countless more drown or starve to death in ghost traps, abandoned or lost crab traps along with discarded nets, throughout their habitat. Among two such abandoned crab pots in a tidal marsh in Georgia, a study found 133 dead terrapins, according to the Center for Biological Diversity
The Center for Biological Diversity is a nonprofit membership organization known for its work protecting endangered species through legal action, scientific petitions, creative media and grassroots activism. It was founded in 1989 by Kieran Suckl ...
.
Further, an increase in seawall
A seawall (or sea wall) is a form of coastal defense constructed where the sea, and associated coastal processes, impact directly upon the landforms of the coast. The purpose of a seawall is to protect areas of human habitation, conservation ...
s and bulkheads being built for storm and erosion control, exacerbated by climate change
In common usage, climate change describes global warming—the ongoing increase in global average temperature—and its effects on Earth's climate system. Climate change in a broader sense also includes previous long-term changes to E ...
and sea level rise
Globally, sea levels are rising due to human-caused climate change. Between 1901 and 2018, the globally averaged sea level rose by , or 1–2 mm per year on average.IPCC, 2019Summary for Policymakers InIPCC Special Report on the Ocean and Cry ...
, inadvertently eliminate terrapin's nesting habitat on beaches and upland areas with soft shorelines.
Due to these factors, the diamondback terrapin is listed as an endangered species
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inv ...
in Rhode Island
Rhode Island (, like ''road'') is a U.S. state, state in the New England region of the Northeastern United States. It is the List of U.S. states by area, smallest U.S. state by area and the List of states and territories of the United States ...
, a threatened species
Threatened species are any species (including animals, plants and fungi) which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensa ...
in Massachusetts and is considered a "species of concern" in Georgia
Georgia most commonly refers to:
* Georgia (country), a country in the Caucasus region of Eurasia
* Georgia (U.S. state), a state in the Southeast United States
Georgia may also refer to:
Places
Historical states and entities
* Related to the ...
, Delaware
Delaware ( ) is a state in the Mid-Atlantic region of the United States, bordering Maryland to its south and west; Pennsylvania to its north; and New Jersey and the Atlantic Ocean to its east. The state takes its name from the adjacent Del ...
, Alabama
(We dare defend our rights)
, anthem = "Alabama (state song), Alabama"
, image_map = Alabama in United States.svg
, seat = Montgomery, Alabama, Montgomery
, LargestCity = Huntsville, Alabama, Huntsville
, LargestCounty = Baldwin County, Al ...
, Louisiana
Louisiana , group=pronunciation (French: ''La Louisiane'') is a state in the Deep South and South Central regions of the United States. It is the 20th-smallest by area and the 25th most populous of the 50 U.S. states. Louisiana is borde ...
, North Carolina
North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and So ...
, and Virginia
Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth ar ...
. The diamondback terrapin is listed as a "high priority species" under the South Carolina Wildlife Action Plan. In New Jersey
New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware ...
, it was recommended to be listed as a Species of Special Concern in 2001. In July 2016, the species was removed from the New Jersey game list and is now listed as non-game with no hunting season. In Connecticut, there is no open hunting season for this animal. However, it holds no federal conservation status. In 2021, a terrapin was hatched in Massachusetts with two heads, two gastrointestinal systems, and two spines that are fused together.
Conservation status
The species is classified as Vulnerable by the IUCN
The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...
due to decreasing population numbers in most of its range. There is limited protection for terrapins on a state-by-state level throughout its range; it is listed as Endangered in Rhode Island and Threatened in Massachusetts. The Diamondback Terrapin Working Group deal with regional protection issues. There is no national protection except through the Lacey Act
The Lacey Act of 1900 is a conservation law in the United States that prohibits trade in wildlife, fish, and plants that have been illegally taken, possessed, transported, or sold.United States. Lacey Act (Game). , ch. 553. Approved May 25, 1900. ...
, and little international protection.
Diamondback terrapins are the only U.S. turtles that inhabit the brackish waters of estuaries, tidal creeks and salt marshes. With a historic range stretching from Massachusetts to Texas, terrapin populations have been severely depleted by land development and other human impacts along the Atlantic coast.
Earthwatch Institute
Earthwatch Institute is an international environmental charity. Founded as Educational Expeditions International in 1971 by Bob Citron and Clarence Truesdale, Earthwatch supports hundreds of Ph.D. researchers across dozens of countries, conduc ...
, a global non-profit that teams volunteers with scientists to conduct important environmental research, supports a research program called "Tagging the Terrapins of the Jersey Shore." This program allows volunteers to explore the coastal sprawl of New Jersey's Ocean County on Barnegat Bay, one of the most extensive salt marsh ecosystems on the East Coast, in search of this ornate turtle. On this project, volunteers contribute to environmental sustainability in the face of rampant development. Veteran turtle scientists Dr. Hal Avery, Dr. Jim Spotila, Dr. Walter Bien and Dr. Ed Standora are overseeing this program and the viability of terrapin populations in the face of growing environmental change.
Threats
The conservation status was heavily impacted by the consumption of diamondback terrapins in the 1900s when their sweet meat eventually became a multi-million dollar industry for gourmet restaurants. Around the 1920s, with the enforcement of prohibition, the consumption of diamondback terrapins declined. Since then, however, the population has never fully recovered. Another threat is shellfish and mussels cause exposure to paralytic shellfish toxins (PST) that are a result of harmful algal blooms that have been prominent along the coastline where diamondback terrapins reside. Gastrointestinal studies have identified the presence of ingested PST in their tissues which causes muscle weakness, paralysis, etc. that eventually leads to death.
The major threats to diamondback terrapins are all associated with humans and probably differ in different parts of their range. People tend to build their cities on ocean coasts near the mouths of large rivers and in doing so they have destroyed many of the huge marshes that terrapins inhabited. Nationwide, probably >75% of the salt marshes where terrapins lived have been destroyed or altered. Currently, ocean level rise threatens the remainder.
Traps used to catch crabs, both commercially and privately, have commonly caught and drowned many diamondback terrapins, which can result in male-biased populations, local population declines, and even extinctions. When these traps are lost or abandoned (“ghost traps”), they can kill terrapins for many years. Terrapin- excluding devices are available to retrofit crab traps; these reduce the number of terrapins captured while having little or no impact on crab capture rates. In some states (NJ, DE, MD), these devices are required by law.
Nests, hatchlings, and sometimes adults are commonly eaten by raccoons, foxes, rats[Hay, W.P. 1917. Artificial Propagation of the diamondback terrapin. Department of Commerce Bureau of Fisheries Economic Circular No. 5, revised. Pages 3-21] and many species of birds, especially crows and gulls. Density of these predators are often increased because of their association with humans. Predation rates can be extremely high; predation by raccoons on terrapin nests at Jamaica Bay Wildlife Refuge in New York varied from 92 to 100% each year from 1998 to 2008, Burke unpubl. data).
Terrapins are killed by cars when nesting females cross roads and mortality can be high enough to seriously affect populations. Terrapins are still harvested for food in some states. Terrapins may be affected by pollutants such as metals and organic compounds, but this has not been demonstrated in wild populations.
There is an active casual and professional pet trade in terrapins and it is unknown how many are removed from the wild for this purpose. Some people breed the species in captivity and some color variants are considered especially desirable. In Europe, ''Malaclemys'' are widely kept as pets, as are many closely related species.
Relationship with humans
In Maryland
Maryland ( ) is a state in the Mid-Atlantic region of the United States. It shares borders with Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware and the Atlantic Ocean to ...
, diamondback terrapins were so plentiful in the 18th century that slaves protested the excessive use of this food source as their main protein. Late in the 19th century, demand for turtle soup
Turtle soup, also known as Terrapin soup, is a soup or stew made from the meat of turtles. Differing versions of the soup exist in some cultures and are viewed as a delicacy.
Versions China
In China, and in several countries in Southeast Asi ...
claimed a harvest of 89,150 pounds from Chesapeake Bay
The Chesapeake Bay ( ) is the largest estuary in the United States. The Bay is located in the Mid-Atlantic (United States), Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula (including the parts: the ...
in one year. In 1899, terrapin was offered on the dinner menu of renown Delmonico's Restaurant
Delmonico's is the name of a series of restaurants that operated in New York City, with the present version located at 56 Beaver Street in the Financial District of Manhattan. The original version was widely recognized as the United States ...
in New York City as its third most expensive item. Either Maryland or Baltimore terrapin was available for $2.50 (). Although demand was high, over-harvesting diminished capture to a mere 823 pounds by 1920.
According to the FAA
The Federal Aviation Administration (FAA) is the largest transportation agency of the U.S. government and regulates all aspects of civil aviation in the country as well as over surrounding international waters. Its powers include air traffic m ...
National Wildlife Strike Database, a total of 18 strikes between diamondback terrapins and civil aircraft were reported in the US from 1990 to 2007, none of which caused damage to the aircraft. On July 8, 2009, flights at John F. Kennedy Airport
John F. Kennedy International Airport (colloquially referred to as JFK Airport, Kennedy Airport, New York-JFK, or simply JFK) is the main international airport serving New York City. The airport is the busiest of the seven airports in the New ...
in New York City
New York, often called New York City or NYC, is the List of United States cities by population, most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the L ...
were delayed for up to one and a half hours as 78 diamondback terrapins had invaded one of the runways. The turtles, which according to airport authorities were believed to have entered the runway in order to nest, were removed and released back into the wild. A similar incident happened on June 29, 2011, when over 150 turtles crossed runway 4, closing the runway and disrupting air traffic. Those terrapins were also relocated safely. The Port Authority of New York and New Jersey installed a turtle barrier along runway 4L at JFK to reduce the number of terrapins on the runway and encourage them to nest elsewhere. Nevertheless, on June 26, 2014, 86 terrapins made it onto the same runway, as a high tide carried them over the barrier. Their population is controlled by the raccoon population; it has been shown that as the raccoons decrease in number, mating terrapins increase, leading to increased turtle activity at the airport.
Many human activities threaten the safety of diamondback terrapins. The terrapins get caught and drown in crab nets that humans put out, are suffocated
Asphyxia or asphyxiation is a condition of deficient supply of oxygen to the body which arises from abnormal breathing. Asphyxia causes generalized hypoxia, which affects primarily the tissues and organs. There are many circumstances that can i ...
by pollution
Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the ...
that humans greatly contribute to, and lose their marsh and estuarine habitats because of urban development
Urban means "related to a city". In that sense, the term may refer to:
* Urban area, geographical area distinct from rural areas
* Urban culture, the culture of towns and cities
Urban may also refer to:
General
* Urban (name), a list of people ...
.
History as a delicacy
Diamondback terrapins were heavily harvested for food in colonial America and probably before that by Native Americans. Terrapins were so abundant and easily obtained that slaves and even the Continental Army ate large numbers of them.
In the 19th century, a dish called "Terrapin à la Maryland", a stew with cream and sherry, was a canonical element, along with canvasback duck
The canvasback (''Aythya valisineria'') is a species of diving duck, the largest found in North America.
Taxonomy
Scottish-American naturalist Alexander Wilson described the canvasback in 1814. The genus name is derived from Greek ''aithuia'', ...
, of the elegant and regional "Maryland Feast" menu, an "elite standard...that lasted for decades".[Paul Freedman, "Terrapin Monster", p. 51-64 of Dina Khapaeva, ed., ''Man-Eating Monsters: Anthropocentrism and Popular Culture'', , p. 59]
By 1917, terrapins sold for as much as $5 each (). Huge numbers of terrapins were harvested from marshes and marketed in cities. By the early 1900s, populations in the northern part of the range were severely depleted and the southern part was greatly reduced as well.[Coker, R. E. 1931. The diamondback terrapin in North Carolina. In (ed) H. F. Taylor, Survey of Marine Fisheries of North Carolina. University of North Carolina Press, Chapel Hill, NC pp. 219-230] As early as 1902 the U.S. Bureau of Fisheries (which later became the U.S. Fish and Wildlife Service) recognized that terrapin populations were declining and started building large research facilities, centered at the Beaufort, North Carolina Fisheries Laboratory, to investigate methods for captive breeding terrapins for food. People tried (unsuccessfully) to establish them in many other locations, including San Francisco.
Use as a symbol
Maryland named the diamondback terrapin its official state reptile
Twenty-eight U.S. states have named an official state reptile. As with other state symbols, states compare admirable aspects of the reptile and of the state, within designating statutes. Schoolchildren often start campaigns promoting their favo ...
in 1994. The University of Maryland, College Park
The University of Maryland, College Park (University of Maryland, UMD, or simply Maryland) is a public land-grant research university in College Park, Maryland. Founded in 1856, UMD is the flagship institution of the University System of Mary ...
has used the species as its nickname (the Maryland Terrapins
The Maryland Terrapins, commonly referred to as the Terps, consist of 19 men's and women's varsity intercollegiate athletic teams that represent the University of Maryland, College Park in National Collegiate Athletic Association (NCAA) Divis ...
) and mascot ( Testudo) since 1933, and the school newspaper has been named ''The Diamondback
''The Diamondback'' is an independent student newspaper associated with the University of Maryland, College Park. It began in 1910 as ''The Triangle'' and became known as ''The Diamondback'' in 1921. Now a weekly online journal, ''The Diamondback ...
'' since 1921. Accordingly, the athletic teams are often known as "Terps" for short. The Baltimore baseball club entry in the Federal League
The Federal League of Base Ball Clubs, known simply as the Federal League, was an American professional baseball league that played its first season as a minor league in 1913 and operated as a "third major league", in competition with the e ...
during 1914 and 1915 was called the Baltimore Terrapins
The Baltimore Terrapins were one of the most successful teams in the short-lived Federal League of professional baseball from to , but their brief existence led to litigation that led to an important legal precedent in baseball. The team played i ...
. The terrapin has also been a symbol of the Grateful Dead
The Grateful Dead was an American rock music, rock band formed in 1965 in Palo Alto, California. The band is known for its eclectic style, which fused elements of rock, Folk music, folk, country music, country, jazz, bluegrass music, bluegrass, ...
, upon the release of their studio album, "Terrapin Station
''Terrapin Station'' is the ninth studio album by the Grateful Dead, released July 27, 1977. It was the first Grateful Dead album on Arista Records and the first studio album after the band returned to live touring, following a nearly two-year ...
"; as a result, many images of the terrapin dancing with a tambourine appear on posters and t-shirts in Grateful Dead memorabilia. Inspired by the former song, the Terrapin Beer Company
Terrapin Beer Company is a brewery founded in 2002 by Brian "Spike" Buckowski and John Cochran in Athens, Georgia, United States. In July 2016, Molson Coors announced its majority stake in Terrapin, ending its status as a craft brewery.
History
...
also uses a terrapin as its namesake and logo on its packaging.
References
Bibliography
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External links
Video of a diamondback terrapin in Ocean City, NJ, 20 June 2010
Jonathan's Diamondback Terrapin World
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{{Taxonbar, from=Q569170
Fauna of the Eastern United States
Reptiles of the United States
Symbols of Maryland
Malaclemys
Reptiles described in 1793
Taxa named by Johann David Schoepff