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Rhynchopsitta
The thick-billed parrots are stocky brilliant green Neotropical parrots with heavy black beaks of genus ''Rhynchopsitta'' of thick billed macaw-like parrots. The genus comprises two extant species, the thick-billed parrot and the maroon-fronted parrot, as well as an extinct species from the Late Pleistocene in Mexico. The two extant taxa were formerly considered conspecific; they have become rare and are restricted to a few small areas in northern Mexico. The range of the thick-billed parrot formerly extended into the southwestern United States; attempts at reintroduction have been unsuccessful so far. Description The two living species have a similar overall appearance, the principal differences lying in their relative sizes and brightness of coloration. Both are mainly green, with red or maroon markings on the forehead, forecrown, broad superciliary stripe, and feathers on the bend of the wing, the carpal edge and the thighs. Their eye-rings are yellow, with the feet and be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thick-billed Parrot
The thick-billed parrot (''Rhynchopsitta pachyrhyncha'') is a medium-sized parrot endemic to Mexico that formerly ranged into the southwestern United States. Its position in parrot phylogeny is the subject of ongoing discussion; it is sometimes referred to as thick-billed macaw or thick-billed conure. In Mexico, it is locally called ''guacamaya'' ("macaw") or ''cotorra serrana'' ("mountain parrot"). Classified internationally as Endangered through IUCN, the thick-billed parrot's decline has been central to multiple controversies over wildlife management. In 2018, the estimated wild population in Mexico was 1,700. Taxonomy ''Pachyrhyncha'' is currently classified as a species of the genus ''Rhynchopsitta'' of macaw-like thick-billed parrots of which there are two extant species (the other being the maroon-fronted parrot), and one extinct species. However, recent molecular DNA studies indicate that ''pachyrhyncha'' and its sister species ''terrisi'' in genus ''Rhynchopsitta'' are c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhynchopsitta Pachyrhyncha
The thick-billed parrot (''Rhynchopsitta pachyrhyncha'') is a medium-sized parrot endemic to Mexico that formerly ranged into the southwestern United States. Its position in parrot phylogeny is the subject of ongoing discussion; it is sometimes referred to as thick-billed macaw or thick-billed conure. In Mexico, it is locally called ''guacamaya'' ("macaw") or ''cotorra serrana'' ("mountain parrot"). Classified internationally as Endangered through IUCN, the thick-billed parrot's decline has been central to multiple controversies over wildlife management. In 2018, the estimated wild population in Mexico was 1,700. Taxonomy ''Pachyrhyncha'' is currently classified as a species of the genus '' Rhynchopsitta'' of macaw-like thick-billed parrots of which there are two extant species (the other being the maroon-fronted parrot), and one extinct species. However, recent molecular DNA studies indicate that ''pachyrhyncha'' and its sister species ''terrisi'' in genus ''Rhynchopsitta'' a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhynchopsitta Terrisi
The maroon-fronted parrot (''Rhynchopsitta terrisi'') is a large, macaw-like parrot. It is dark green with a dark red shoulder and a maroon forehead and eye-stripe. Its underside of the wings and tail appear to be black when it is in flight. It makes a high, rolling ''cr-a ak'' sound. Groups sound similar to the acorn woodpecker if they are heard from a distance. The species is endemic to northeastern Mexico, where only about 2500–3000 birds survive in the wild. Taxonomy ''R. terrisi'' is one of two extant and one extinct species of genus ''Rhynchopsitta'' of thick-billed parrots. Description The maroon-fronted parrot is a large mostly green parrot which measures in length and weighs .''CRC Handbook of Avian Body Masses'' by John B. Dunning Jr. (Editor). CRC Press (1992), . The adults have a dark maroon brow which extends over the rim of bare yellow skin that surrounds the eyes. They have a brighter red at the bend of the wing. The tail is long and pointed. The underside o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maroon-fronted Parrot
The maroon-fronted parrot (''Rhynchopsitta terrisi'') is a large, macaw-like parrot. It is dark green with a dark red shoulder and a maroon forehead and eye-stripe. Its underside of the wings and tail appear to be black when it is in flight. It makes a high, rolling ''cr-a ak'' sound. Groups sound similar to the acorn woodpecker if they are heard from a distance. The species is endemic to northeastern Mexico, where only about 2500–3000 birds survive in the wild. Taxonomy ''R. terrisi'' is one of two extant and one extinct species of genus ''Rhynchopsitta'' of thick-billed parrots. Description The maroon-fronted parrot is a large mostly green parrot which measures in length and weighs .''CRC Handbook of Avian Body Masses'' by John B. Dunning Jr. (Editor). CRC Press (1992), . The adults have a dark maroon brow which extends over the rim of bare yellow skin that surrounds the eyes. They have a brighter red at the bend of the wing. The tail is long and pointed. The underside of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhynchopsitta Phillipsi
''Rhynchopsitta phillipsi'' is an extinct species of thick-billed parrot. It was described in 1997 from Late Pleistocene cave deposits from Nuevo León in northeastern Mexico. The specific epithet honours American ornithologist Allan Robert Phillips Allan Robert Phillips (October 25, 1914 – January 26, 1996) was an American ornithologist. He mainly studied bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beak .... References Rhynchopsitta Birds described in 1997 Fossil taxa described in 1997 Pleistocene birds of North America {{parrot-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neotropical Parrot
The neotropical parrots or New World parrots comprise about 150 species in 32 genera found throughout South and Central America, Mexico, the Caribbean islands and (formerly) the southern United States. Among them are some of the most familiar and iconic parrots, including the blue and gold macaw, sun conure, and yellow-headed amazon. The parrots of the New World have been known to Europeans since Columbus remarked upon them in his journal in 1492. Systematic descriptions of the birds were first available in German naturalist Georg Marcgraf's ''Historia Naturalis Brasiliae'' published in 1648, and English naturalist Mark Catesby's two-volume ''Natural History of Carolina, Florida and the Bahama Islands'' published in London in 1731 and 1743. Several species and one genus have become extinct in recent centuries. A second genus is extinct in the wild. Over a third of the extant species are classified as threatened by the IUCN. A few of these are in imminent danger of extinction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Above Mean Sea Level
Height above mean sea level is a measure of the vertical distance (height, elevation or altitude) of a location in reference to a historic mean sea level taken as a vertical datum. In geodesy, it is formalized as ''orthometric heights''. The combination of unit of measurement and the physical quantity (height) is called "metres above mean sea level" in the metric system, while in United States customary and imperial units it would be called "feet above mean sea level". Mean sea levels are affected by climate change and other factors and change over time. For this and other reasons, recorded measurements of elevation above sea level at a reference time in history might differ from the actual elevation of a given location over sea level at a given moment. Uses Metres above sea level is the standard measurement of the elevation or altitude of: * Geographic locations such as towns, mountains and other landmarks. * The top of buildings and other structures. * Flying objects such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tree Hollow
A tree hollow or tree hole is a semi-enclosed cavity which has naturally formed in the trunk or branch of a tree. They are found mainly in old trees, whether living or not. Hollows form in many species of trees, and are a prominent feature of natural forests and woodlands, and act as a resource or habitat for a number of vertebrate and invertebrate animals. Hollows may form as the result of physiological stress from natural forces causing the excavating and exposure of the heartwood. Forces may include wind, fire, heat, lightning, rain, attack from insects (such as ants or beetles), bacteria, or fungi. Also, trees may self-prune, dropping lower branches as they reach maturity, exposing the area where the branch was attached. Many animals further develop the hollows using instruments such as their beak, teeth or claws. The size of hollows may depend on the age of the tree. For example, eucalypts develop hollows at all ages, but only from when the trees are 120 years old do they f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct
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 recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossils
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 in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the absolute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quaternary Glaciation
The Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma (million years ago) and is ongoing. Although geologists describe this entire period up to the present as an "ice age", in popular culture this term usually refers to the most recent glacial period, or to the Pleistocene epoch in general. Since Earth still has polar ice sheets, geologists consider the Quaternary glaciation to be ongoing, though currently in an interglacial period. During the Quaternary glaciation, ice sheets appeared, expanding during glacial periods and contracting during interglacial periods. Since the end of the last glacial period, only the Antarctic and Greenland ice sheets have survived, with other sheets formed during glacial periods, such as the Laurentide Ice Sheet, having completely melted. The major effects of the Quaternary glaciation have been the continental erosion o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Climate Change (general Concept)
Climate variability includes all the variations in the climate that last longer than individual weather events, whereas the term climate change only refers to those variations that persist for a longer period of time, typically decades or more. ''Climate change'' may refer to any time in Earth's history, but the term is now commonly used to describe contemporary climate change. Since the Industrial Revolution, the climate has increasingly been affected by human activities. The climate system receives nearly all of its energy from the sun and radiates energy to outer space. The balance of incoming and outgoing energy and the passage of the energy through the climate system is Earth's energy budget. When the incoming energy is greater than the outgoing energy, Earth's energy budget is positive and the climate system is warming. If more energy goes out, the energy budget is negative and Earth experiences cooling. The energy moving through Earth's climate system finds expression ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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