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Bird collections are used for a wide variety of purposes. All biological species including those of birds are represented by a holotype, the vast majority of which are full specimens (mostly skins) and in modern times explicitly designated in the original description of the taxon. All other putative members of the species may be compared to the ...
Bird conservation requires specialized knowledge in aspects of biology and ecology, and may require the use of very location-specific approaches. Ornithologists contribute to conservation biology by studying the ecology of birds in the wild and identifying the key threats and ways of enhancing the survival of species. [119]
A significant portion of the audiovisual content available in Birds of the World is collected through citizen science data collection as provided by eBird, [3] but content is also included from the Macaulay Library, as it was gathered in the Internet Bird Collection by Josep del Hoyo, the initial founder of Lynx Edicions, and his colleagues in ...
As the bird stem group evolved, distinctive bird features such as feathers and hollow bones appeared. Finally, at the base of the crown group, all traits common to extant birds were present. Under the widely used total-group perspective, [ 17 ] the Crocodylomorpha would become synonymous with the Crocodilia, and the Avemetatarsalia would become ...
Thus it was often more practical to shoot the birds or collect their eggs. While the collection of the eggs of wild birds by amateurs was considered a respectable scientific pursuit in the 19th century and early 20th century, [3] from the mid 20th century onwards it was increasingly regarded as being a hobby rather than a scientific discipline.
1961 – Eric Hosking publishes Bird Photography as a Hobby, popularising bird photography. 1961 – William Homan Thorpe publishes Bird-Song. The biology of vocal communication and expression in birds pioneering the use of sound spectrography in bird studies. 1962 – Rachel Carson publishes Silent Spring, describing the ecological dangers of ...
The room was painted a dull hue — what one staffer called “anxiety-inducing yellow.” More than half the room was empty and dark. The clock on the wall looked like it had been cadged from an elementary school sometime around 1983. A staffer called out, “Good morning, Community!” In unison, everyone greeted him.
Domesticated birds raised for meat and eggs, called poultry, are the largest source of animal protein eaten by humans; in 2003, 76 million tons of poultry and 61 million tons of eggs were produced worldwide. [288] Chickens account for much of human poultry consumption, though domesticated turkeys, ducks, and geese are also relatively common. [289]