1) Animal order 2) Order apodiformes 
As their name (`footless` in Greek) suggests, their legs are small and have limited function aside from perching. The feet are covered with bare skin rather than the scales (scutes) that other birds have. Another shared characteristic is long wings with short, stout humerus bones (Hyman 1992). The evolution of these wing characteristics has prov.....
[n] - swifts
order Apodiformes noun swifts; hummingbirds