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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, including the rail. It became extinct due to habitat loss by domestic rabbits, and ultimately World War II. Taxonomy Its scientific name honours Henry Palmer, who collected in the Hawaiian Islands for Walter Rothschild. The following cladogram shows the placement of the among other rails, according to Slikas and colleagues, 2002: Description It was a small bird ( from beaktip to "tail" tip, fully stretched out), a flightless member of the rail family. Tail and wings had been reduced in the course of its evolution to lengths of merely and , respectively, and it only had 8 primaries as opposed to 10 in volant rails. The bill, measuring , was strong and straight, and the legs were also well-developed; in its overall proportions it was similar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Marshall Bailey
Alfred Marshall Bailey (February 18, 1894 – February 25, 1978) was an American ornithology, ornithologist who was associated with the Denver Museum of Nature and Science, Denver Museum of Natural History (now the Denver Museum of Nature and Science) in Colorado for most of his working life. Early years Bailey was born in Iowa City, Iowa, where he went to school and then attended the University of Iowa. While a student there he participated in a three-month scientific expedition to Laysan, one of the Northwestern Hawaiian Islands. Career After graduation in 1916, Bailey served as curator of birds and mammals at the Louisiana State Museum in New Orleans (1916–1919). From 1919 to 1921 he was involved in surveying south-eastern Alaska for the Bureau of Biological Survey (later to become the United States Fish and Wildlife Service), followed by a curatorial stint at the Denver Museum (1921–1926). From 1926 to 1927 he was on the staff of the Field Museum of Natural History in Chi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zapornia Tabuensis
The spotless crake (''Zapornia tabuensis'') is a species of bird in the rail family, Rallidae. It is widely distributed species occurring from the Philippines, New Guinea and Australia, across the southern Pacific Ocean to the Marquesas Islands and south to New Zealand. Taxonomy The spotless crake was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's ''Systema Naturae''. He placed it with the other crakes and rails in the genus ''Rallus'' and coined the binomial name ''Rallus tabuensis''. Gmelin's account is taken from that of the "Tabuan rail" that had been described in 1785 by the English ornithologist John Latham in his book ''A General Synopsis of Birds''. Latham's description was probably based on a plate painted by the German naturalist Georg Forster who had accompanied the British explorer James Cook on his second voyage to the Pacific Ocean. The genus name is an anagram of the genus ''Porza ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rallus
''Rallus'' is a genus of wetland birds of the rail family. Sometimes, the genera ''Lewinia'' and ''Gallirallus'' are included in it. Six of the species are found in the Americas, and the three species found in Eurasia, Africa and Madagascar are very closely related to each other, suggesting they are descended from a single invasion of a New World ancestor.Taylor & van Perlo (1998) These are slim, long-billed rails with slender legs. Their laterally flattened bodies are an adaptation to life in wet reedbeds and marshes, enabling them to slip easily through the dense semi-aquatic vegetation. Typically these birds have streaked brown upperparts, blue-grey on the face or breast, and barred flanks. Only the African rail has a plain back, and the plain-flanked rail lacks any blue-grey in its plumage and has no flank bars. Three endemic South American species are endangered by habitat loss, and the Madagascar rail is becoming rare. Taxonomy The genus ''Rallus'' was erected in 1758 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porzana
''Porzana'' is a genus of birds in the crake and rail family, Rallidae. Its scientific name is derived from Venetian terms for small rails. The spotted crake (''P. porzana'') is the type species. Taxonomy The genus ''Porzana'' was erected by the French ornithologist Louis-Pierre Vieillot in 1816 with the spotted crake (''Porzana porzana'') as the type species. The genus unites the typical "crakes" found essentially anywhere in the world except desert and polar regions. It contains 3 living species. In addition, a large number of prehistorically extinct species known only from fossil or subfossil remains have been discovered. The genera ''Coturnicops'', '' Crex'' (including ''Crecopsis'') and ''Laterallus'' have been suggested to be closely related. However, molecular phylogenetic analyses have confirmed the suspicion, raised in the late 20th century in the first cladistic studies of morphology, that the "genus" ''Porzana'' is rather an evolutionary grade, consisting of an asse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feather
Feathers are epidermal growths that form a distinctive outer covering, or plumage, on both avian (bird) and some non-avian dinosaurs and other archosaurs. They are the most complex integumentary structures found in vertebrates and a premier example of a complex evolutionary novelty. They are among the characteristics that distinguish the extant birds from other living groups. Although feathers cover most of the bird's body, they arise only from certain well-defined tracts on the skin. They aid in flight, thermal insulation, and waterproofing. In addition, coloration helps in communication and protection. Plumology (or plumage science) is the name for the science that is associated with the study of feathers. Feathers have a number of utilitarian, cultural, and religious uses. Feathers are both soft and excellent at trapping heat; thus, they are sometimes used in high-class bedding, especially pillows, blankets, and mattresses. They are also used as filling for winter cloth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supercilium
The supercilium is a plumage feature found on the heads of some bird species. It is a stripe which runs from the base of the bird's beak above its eye, finishing somewhere towards the rear of the bird's head.Dunn and Alderfer (2006), p. 10 Also known as an "eyebrow", it is distinct from the eyestripe, which is a line that runs across the lores, and continues behind the eye. Where a stripe is present only above the lores, and does not continue behind the eye, it is called a supraloral stripe or simply supraloral. On most species which display a supercilium, it is paler than the adjacent feather tracts. The colour, shape or other features of the supercilium can be useful in bird identification. For example, the supercilium of the dusky warbler, an Old World warbler species, can be used to distinguish it from the very similar Radde's warbler. The dusky warbler's supercilium is sharply demarcated, whitish and narrow in front of the eye, becoming broader and more buffy towards the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baillon's Crake
Baillon's crake (''Zapornia pusilla''), also known as the marsh crake, is a small waterbird of the family Rallidae. Distribution Their breeding habitat is Cyperaceae, sedge beds in Europe, mainly in the east, and across the Palearctic. They used to breed in Great Britain up to the mid-19th century, but the western European population declined through drainage. There has been a recovery in north-western Europe in recent years, with the recolonisation of Germany and the Netherlands, and breeding suspected in Britain; an Irish record in 2012 was the first there since the 1850s. They nest in a dry location in wet sedge bogs, laying 4–8 Bird egg, eggs. This species is bird migration, migratory, wintering in east Africa and south Asia. It is also a resident breeder in Africa and Australasia. There is a single North American record of this species on Attu Island in September 2000. Subspecies There are at least five subspecies of Baillon's crake: * Marsh crake ''Porzana pusilla af ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laterallus
''Laterallus'' is a genus of birds in the rail family Rallidae. These small, relatively short-billed terrestrial rails are found among dense vegetation near water in the Neotropics, although a single species, the black rail, also occurs in the United States. The genus was erected by the English zoologist George Robert Gray in 1855 with the rufous-sided crake (''Laterallus melanophaius'') as the type species. The genus name is a portmanteau of ''Rallus lateralis'', a synonym of the binomial name for the rufous-sided crake. The authors of a molecular genetic study published in 2019 proposed that the yellow-breasted crake, the dot-winged crake, and the flightless Inaccessible Island rail should be moved to this genus. Species The genus contains 13 species: *Black-banded crake, ''Laterallus fasciatus'' *Rufous-sided crake, ''Laterallus melanophaius'' *Rusty-flanked crake, ''Laterallus levraudi'' *Ruddy crake, ''Laterallus ruber'' *White-throated crake, ''Laterallus albigularis'' *Gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Remiges
Flight feathers (''Pennae volatus'') are the long, stiff, asymmetrically shaped, but symmetrically paired pennaceous feathers on the wings or tail of a bird; those on the wings are called remiges (), singular remex (), while those on the tail are called rectrices (), singular rectrix (). The primary function of the flight feathers is to aid in the generation of both thrust and lift, thereby enabling flight. The flight feathers of some birds have evolved to perform additional functions, generally associated with territorial displays, courtship rituals or feeding methods. In some species, these feathers have developed into long showy plumes used in visual courtship displays, while in others they create a sound during display flights. Tiny serrations on the leading edge of their remiges help owls to fly silently (and therefore hunt more successfully), while the extra-stiff rectrices of woodpeckers help them to brace against tree trunks as they hammer on them. Even flightless birds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evolution
Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes, which are passed on from parent to offspring during reproduction. Variation tends to exist within any given population as a result of genetic mutation and recombination. Evolution occurs when evolutionary processes such as natural selection (including sexual selection) and genetic drift act on this variation, resulting in certain characteristics becoming more common or more rare within a population. The evolutionary pressures that determine whether a characteristic is common or rare within a population constantly change, resulting in a change in heritable characteristics arising over successive generations. It is this process of evolution that has given rise to biodiversity at every level of biological organisation, including the levels of species, individual organisms, and molecules. The theory of evolution by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rallidae
The rails, or Rallidae, are a large cosmopolitan family of small- to medium-sized, ground-living birds. The family exhibits considerable diversity and includes the crakes, coots, and gallinules. Many species are associated with wetlands, although the family is found in every terrestrial habitat except dry deserts, polar regions, and alpine areas above the snow line. Members of the Rallidae occur on every continent except Antarctica. Numerous island species are known. The most common rail habitats are marshland and dense forest. They are especially fond of dense vegetation.Horsfall & Robinson (2003): pp. 206–207 Name "Rail" is the anglicized respelling of the French ''râle'', from Old French ''rasle''. It is named from its harsh cry, in Vulgar Latin *''rascula'', from Latin ''rādere'' ("to scrape"). Morphology The rails are a family of small to medium-sized, ground-living birds. They vary in length from and in weight from . Some species have long necks and in many ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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