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A dragonfly in its radical final moult, metamorphosing from an aquatic nymph to a winged adult.. In biology, moulting (British English), or molting (American English), also known as sloughing, shedding, or in many invertebrates, ecdysis, is a process by which an animal casts off parts of its body to serve some beneficial purpose, either at specific times of the year, or at specific points in ...
When the bird is molting, the molt is known as a prejuvenal, prebasic, prealternate, or presupplemental molt, depending on which type follows the molt. For birds that do not completely molt into full adult plumage the first time, a numbering system is used to signify which plumage it is in. For example, for the first time a bird enters basic ...
The largest concentration of motmots reside in Honduras and Guatemala, with a total of 7 subspecies. It is also the national bird of Nicaragua and El Salvador. There is also evidence that the male tail, which is slightly larger than the female tail, functions as a sexual signal in the turquoise-browed motmot.
The blue-capped motmot or blue-crowned motmot (Momotus coeruliceps) is a colorful near-passerine bird found in forests and woodlands of eastern Mexico. This species and the Lesson's Motmot, Whooping Motmot, Trinidad Motmot, Amazonian Motmot, and Andean Motmot were all considered conspecific. The IUCN uses blue-crowned as their identifier for ...
The American goldfinch undergoes a molt in the spring and autumn. It is the only cardueline finch to undergo molting twice a year. [14] During the winter molt it sheds all its feathers; in the spring, it sheds all but the wing and tail feathers, which are dark brown in the female and black in the male. [13]
An Alaska seabird species faced the worst mortality event in modern history, and the population isn’t recovering, a study finds. Experts discuss the future implications.
1797–1804 – Publication of Thomas Bewick's A History of British Birds; 1799 – François Marie Daudin writes Traité élémentaire et complet d'Ornithologie (Natural History of Birds), one of the first "modern" handbooks of ornithology, combining Linnean binomial nomenclature with the anatomical and physiological descriptions of Buffon ...
The specimen is housed in the National Museum of Natural History. Genetic work has not been done on this bird, but observation of the plumage has been done. The controversy stems from the uncertainty from authors whether the bird is an extinct species, a rare color-variant of the dickcissel, or a hybrid female dickcissel and male blue grosbeak.