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This translates to some birds with a visible spectrum on par with humans, and other birds with greatly expanded sensitivity to UV light. The LWS opsin of birds is sometimes reported to have a peak wavelength above 600 nm, but this is an effective peak wavelength that incorporates the filter of avian oil droplets. [34]
The white-eared parakeet is 23 to 25 cm (9.1 to 9.8 in) long. The sexes are the same. Adults have a light brown crown, a bluish forehead and hindneck, a maroon face, and whitish ear coverts. Their upperparts are mostly green with a reddish rump. Their chin, throat, and the sides of their neck are green with light buff scaling.
The Australian budgerigar, or shell parakeet, is a popular pet and the most common parakeet. Parakeets comprise about 115 species of birds that are seed-eating parrots of small size, slender build, and long, tapering tails. [citation needed] The Australian budgerigar, also known as "budgie", Melopsittacus undulatus, is probably the most common ...
Birds of prey are diurnal because, although their eyes are large, they are optimised to give maximum spatial resolution rather than light gathering, so they also do not function well in poor light. [15] Many birds have an asymmetry in the eye's structure which enables them to keep the horizon and a significant part of the ground in focus ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 11 January 2025. Small, long-tailed, seed-eating parakeet Budgerigar Temporal range: Pliocene–Holocene Pre๊ ๊ O S D C P T J K Pg N Blue cere indicates male Flaking brown cere indicates female in breeding condition Conservation status Least Concern (IUCN 3.1) Scientific classification Domain ...
These birds love to climb, chew, and play. They're also very vocal and naturally produce loud screams and mimic things they hear around them. They can learn words and phrases because they're very ...
What is now Finsch's parakeet (P. finschi) was for a time treated as a fourth subspecies of white-eyed parakeet, and they now constitute a superspecies. [8] The white-eyed parakeet's specific epithet is derived from the Ancient Greek leukos "white" and ophthalmos "eye". [9] In Brazil White-eyed parakeets feeding, apparently on queen palm fruit
With a beaver’s tail, webbed feet, and a duck’s bill, platypuses are one of the world’s strangest-looking creatures. They are such an unusual mammal that the first scientists to study them ...