The Laysan finch (''Telespiza cantans'') is a species of

Hawaiian honeycreeper Hawaiian honeycreepers are a group of small, passerine birds endemic to Hawaii. They are closely related to the rosefinches in the genus ''Carpodacus'', but many species have evolved features unlike those present in any other finch. Their great ...

, that is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the

Northwestern Hawaiian Islands The Northwestern Hawaiian Islands or Leeward Hawaiian Islands are a series of islands and atolls in the Hawaiian island chain located northwest (in some cases, far to the northwest) of the islands of Kauai and Niihau. Politically, they are all p ...

. It is one of four remaining finch-billed Hawaiian honeycreepers and is closely related to the smaller

Nihoa finch The Nihoa finch (''Telespiza ultima'') is one of the two endemic bird species of the tiny Hawaiian island Nihoa, the other being the Nihoa millerbird. When it was classified in 1917, scientists thought that it would be the last endemic species nam ...

. The Laysan finch is named for

Laysan Laysan (; haw, italics=no, Kauō ), located northwest of Honolulu at , is one of the Northwestern Hawaiian Islands. It comprises one land mass of , about in size. It is an atoll of sorts, although the land completely surrounds a shallow c ...

, the island to which it was endemic on its discovery. It was subsequently introduced to a few other

atoll An atoll () is a ring-shaped island, including a coral rim that encircles a lagoon partially or completely. There may be coral islands or cays on the rim. Atolls are located in warm tropical or subtropical oceans and seas where corals can gr ...

s, and its historical range included some of the main islands.

Description

The Laysan finch is a large honeycreeper with a heavy bill. Overall the male has yellow

plumage Plumage ( "feather") is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, ...

with a whitish belly and a grey neck. The female is duller than the male, with brown streaking. It is almost impossible to confuse the Laysan finch with any other bird in the field as it is the only

passerine A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped'), which includes more than half of all bird species. Sometimes known as perching birds, passerines are distinguished from other orders of birds by t ...

species found on the few islands it lives on.

Range and behavior

Range

On its discovery, the Laysan finch was an

resident of the small island of

, along with the

Laysan rail The Laysan rail or Laysan crake (''Zapornia palmeri'') was a flightless bird endemic to the Northwest Hawaiian Island of Laysan. This small island was and still is an important seabird colony, and sustained a number of endemic species, includ ...

(''Porzana palmeri''), the

Laysan honeycreeper The Laysan honeycreeper or Laysan apapane (''Himatione fraithii'') is an extinct bird species that was endemic to the island of Laysan in the Northwestern Hawaiian Islands. Taxonomy The species was described by the British ornithologist Walter ...

(''Himatione fraithii''), the

Laysan duck The Laysan duck (''Anas laysanensis''), also known as the Laysan teal, is a dabbling duck endemic to the Hawaiian Islands. Fossil evidence reveals that Laysan ducks once lived across the entire archipelago, but today survive only on Laysan Isl ...

(''Anas laysanensis''), and the

Laysan millerbird The Laysan millerbird (''Acrocephalus familiaris familiaris'') was a subspecies of the millerbird, similar in appearance to the remaining subspecies, the Nihoa millerbird. Its dorsal side was brown, and its belly was grayish. Its name derives fr ...

(''Acrocephalus familiaris familiaris''). Populations were introduced to several islands, including

Pearl and Hermes Atoll The Pearl and Hermes Atoll ( haw, Holoikauaua), also known as Pearl and Hermes Reef, is part of the Northwestern Hawaiian Islands, a group of small islands and atolls that form the farthest northwest portion of the Hawaiian island chain. The ...

, where the species persists, and

Midway Atoll Midway Atoll (colloquial: Midway Islands; haw, Kauihelani, translation=the backbone of heaven; haw, Pihemanu, translation=the loud din of birds, label=none) is a atoll in the North Pacific Ocean. Midway Atoll is an insular area of the Unit ...

, where it survived until the introduction of

rat Rats are various medium-sized, long-tailed rodents. Species of rats are found throughout the order Rodentia, but stereotypical rats are found in the genus ''Rattus''. Other rat genera include ''Neotoma'' ( pack rats), ''Bandicota'' (bandicoot ...

s. The

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

record shows that the finch once had a greater range in Hawaii, reaching as far as

Oahu Oahu () (Hawaiian language, Hawaiian: ''Oʻahu'' ()), also known as "The Gathering place#Island of Oʻahu as The Gathering Place, Gathering Place", is the third-largest of the Hawaiian Islands. It is home to roughly one million people—over t ...

, and that birds on Laysan represent a

relict A relict is a surviving remnant of a natural phenomenon. Biology A relict (or relic) is an organism that at an earlier time was abundant in a large area but now occurs at only one or a few small areas. Geology and geomorphology In geology, a r ...

population.

Behavior

The Laysan finch nests in vegetation, laying three eggs in a cup-shaped nest. These are incubated for 16 days by the female, the male in turn feeding the female. The chicks

fledge Fledging is the stage in a flying animal's life between hatching or birth and becoming capable of flight. This term is most frequently applied to birds, but is also used for bats. For altricial birds, those that spend more time in vulnerable c ...

after three weeks and are cared for by the parents for another three weeks. The Laysan finch is a

generalist A generalist is a person with a wide array of knowledge on a variety of subjects, useful or not. It may also refer to: Occupations * a physician who provides general health care, as opposed to a medical specialist; see also: ** General pract ...

, feeding on

seed A seed is an embryonic plant enclosed in a protective outer covering, along with a food reserve. The formation of the seed is a part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiospe ...

s, small

insect Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen), three pairs ...

fruit In botany, a fruit is the seed-bearing structure in flowering plants that is formed from the ovary after flowering. Fruits are the means by which flowering plants (also known as angiosperms) disseminate their seeds. Edible fruits in particu ...

carrion Carrion () is the decaying flesh of dead animals, including human flesh. Overview Carrion is an important food source for large carnivores and omnivores in most ecosystems. Examples of carrion-eaters (or scavengers) include crows, vultures, c ...

(of

seabird Seabirds (also known as marine birds) are birds that are adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same enviro ...

s and

Hawaiian monk seal The Hawaiian monk seal (''Neomonachus schauinslandi'') is an endangered species of earless seal in the family Phocidae that is endemic to the Hawaiian Islands. The Hawaiian monk seal is one of two extant monk seal species; the other is the Med ...

s), and the

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 ...

of nesting seabirds. While unable to break into the eggs of the larger seabirds (such as

albatross Albatrosses, of the biological family Diomedeidae, are large seabirds related to the procellariids, storm petrels, and diving petrels in the order Procellariiformes (the tubenoses). They range widely in the Southern Ocean and the North Pacifi ...

and

boobies A booby is a seabird in the genus ''Sula'', part of the family Sulidae. Boobies are closely related to the gannets (''Morus''), which were formerly included in ''Sula''. Systematics and evolution The genus ''Sula'' was introduced by the Frenc ...

) they will scavenge from them. They actively take the eggs of smaller seabirds such as those of

white tern The white tern or common white tern (''Gygis alba'') is a small seabird found across the tropical oceans of the world. It is sometimes known as the fairy tern, although this name is potentially confusing as it is also the common name of '' Sternu ...

(''Gygis alba'') and the endemic

(''Anas laysanensis'').

Conservation

The Laysan finch is listed 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 ...

because of its highly restricted range and vulnerability to extremes of weather, and it is considered endangered by the State of Hawaii and U.S. government. It survived the devastating effects of the

introduction Introduction, The Introduction, Intro, or The Intro may refer to: General use * Introduction (music), an opening section of a piece of music * Introduction (writing), a beginning section to a book, article or essay which states its purpose and g ...

domestic rabbit A domestic or domesticated rabbit (''Oryctolagus cuniculus domesticus'')—more commonly known as a pet rabbit, bunny, bun, or bunny rabbit—is a subspecies of European rabbit, a member of the lagomorph family. A male rabbit is known as a ''bu ...

s (unlike the

honeycreeper The typical honeycreepers form a genus ''Cyanerpes'' of small birds in the tanager family Thraupidae. They are found in the tropical New World from Mexico south to Brazil. They occur in the forest canopy, and, as the name implies, they are specia ...

and

rail Rail or rails may refer to: Rail transport *Rail transport and related matters *Rail (rail transport) or railway lines, the running surface of a railway Arts and media Film * ''Rails'' (film), a 1929 Italian film by Mario Camerini * ''Rail'' ( ...

) by taking

and

. Laysan is now part of the

Hawaiian Islands National Wildlife Refuge Hawaiian may refer to: * Native Hawaiians, the current term for the indigenous people of the Hawaiian Islands or their descendants * Hawaii state residents, regardless of ancestry (only used outside of Hawaii) * Hawaiian language Historic uses * ...

. The population is considered stable with the biggest threat being uncontrollable climate change.

Gallery

File:Telespiza cantans Laysan Island.jpg, On Laysan Image:TelespizaCantansKeulemans.jpg, Illustration File:Telespiza cantans -Laysan, Northwestern Hawaiian Islands, USA -three-8.jpg, Habitat File:TelespizaFlavissima Ei.jpg, Nest

References

* Morin, M. P., and S. Conant. 2002. Laysan Finch (''Telespiza cantans'') and Nihoa Finch (''Telespiza ultima''). ''In'' The Birds of North America, No. 639 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia, PA.

External links

BirdLife Species Factsheet
{{Taxonbar, from=Q278099 Hawaiian honeycreepers Telespiza Natural history of the Northwestern Hawaiian Islands Endemic birds of Hawaii Birds described in 1890 ESA endangered species Taxa named by Scott Barchard Wilson