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A claw is a curved, pointed appendage found at the end of a toe or finger in most amniotes ... Felidae, almost all of whose members have fully protractible claws.
A chela (/ ˈ k iː l ə /) – also called a claw, nipper, or pincer – is a pincer-shaped organ at the end of certain limbs of some arthropods. [1] The name comes from Ancient Greek χηλή, through Neo-Latin chela. The plural form is chelae. [2] Legs bearing a chela are called chelipeds. [3]
Felids invaded the continent from Eurasia about 20 million years ago and were better ambush predators, in part due to their retractable claws. [9] Climate change, which led to the replacement of North American forests with grasslands, may also have been a factor; [ 10 ] borophagines were less suited to running down prey than canines. [ 8 ]
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The claws are typically curved and the radius of curvature tends to be greater as the bird is larger although they tend to be straighter in large ground dwelling birds such as ratites. [22] Some species (including nightjars , herons , frigatebirds , owls and pratincoles ) have comb-like serrations on the claw of the middle toe that may aid in ...
The hairy frog is also notable in possessing retractable "claws", which it may project through the skin, apparently by intentionally breaking the bones of the toe. [5] These are not true claws, as they are made of bone, not keratin. In addition, there is a small bony nodule nestled in the tissue just beyond the frog's fingertip.
It uses its tail to assist balance and has semi-retractable claws that it uses to climb trees in its search for prey. [15] It has semiplantigrade feet, [4] switching between a plantigrade-like gait (when arboreal) and a digitigrade-like one (when terrestrial). [17] The soles of its paws are nearly bare and covered with strong pads. [4]
Like many other early carnivoramorphans, it was well suited for an arboreal climbing lifestyle with needle-sharp claws, limbs, and joints resembling modern carnivorans. Miacis was probably a very agile forest dweller that preyed upon smaller animals, such as small mammals, reptiles, and birds, and might also have eaten eggs and fruits. [7]