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Beta-keratin (β-keratin) is a member of a structural protein family found in the epidermis of reptiles and birds. [1] [2] Beta-keratins were named so because they are components of epidermal stratum corneum rich in stacked beta sheets, in contrast to alpha-keratins, intermediate-filament proteins also found in stratum corneum and rich in alpha helices. [3]
Fish locomotion is the various types of animal locomotion used by fish, principally by swimming. This is achieved in different groups of fish by a variety of mechanisms of propulsion, most often by wave-like lateral flexions of the fish's body and tail in the water, and in various specialised fish by motions of the fins.
An adult bird which has been beak-trimmed as a chick. Beak trimming (also spelled as beak-trimming; informally as debeaking), or beak conditioning, is the partial removal of the beak of poultry, especially layer hens and turkeys, although it is also be performed on some quail and ducks. When multiple birds are confined in small spaces due to ...
The tools, on average, were about 60 cm (24 in) long and 1.1 cm (0.4 in) in circumference. The chimpanzee then jabbed the spear into hollows in tree trunks where bushbabies sleep. [ 37 ] There was a single case in which a chimpanzee successfully extracted a bushbaby with the tool.
Butterflying pork loin. Butterflying is a way of preparing meat, fish, or poultry for cooking by cutting it almost in two, but leaving the two parts connected; it is then often boned and flattened. [ 1] Spatchcocking is a specific method for butterflying poultry that involves removing the backbone, and spatchcock as a noun may refer to a bird ...
A wing-clipped Meyer's parrot perching on a drawer handle. While clipping is endorsed by some avian veterinarians, others oppose it. [7]By restricting flight, wing clipping may help prevent indoor birds from risking injury from ceiling fans or flying into large windows, but no evidence shows that clipped birds are safer than full-winged ones, only that clipped birds are subject to different ...
Preening is a maintenance behaviour found in birds that involves the use of the beak to position feathers, interlock feather barbules that have become separated, clean plumage, and keep ectoparasites in check. Feathers contribute significantly to a bird's insulation, waterproofing and aerodynamic flight, and so are vital to its survival.
The cut-throat finch has plumage that is pale, sandy brown with flecks of black all over. It has a black-brown tail, a thick white chin and cheeks, and a chestnut brown patch on the belly. The legs are a pink fleshy colour. The adult male has a bright red band across its throat (thus the name "cut throat"), while the male juveniles have a ...