<unk>  is the informal and common name for syndactyly affecting the feet—the fusion of two or more digits of the feet. This is normal in many birds, such as ducks; amphibians, such as frogs; and some mammals, such as kangaroos. In humans it is rare, occurring once in about 2,000 to 2,500 live births: most commonly the second and third<unk>  are<unk>  (joined by skin and flexible tissue), which can reach partly or almost fully up the toe.
Webbed toes
Polydactyly
Clinodactyly
Brachydactyly
Syndactyly
Oligodactyly
Pachydermodactyly
Black heel and palm