zygodactyl

Having two toes projecting forward and two projecting backward, as certain climbing birds.

A zygodactyl bird, such as a parrot.

In ornithology, yoke-toed: noting those birds, or the feet of those birds, which have the toes disposed in pairs, two before and two behind.

A yoke-toed bird; a bird having the toes arranged in pairs.

Any zygodactylous bird.

Having two toes pointing forward, and two pointing backward; zygodactylous.

Any such bird (such as the parrot.)

(of bird feet) having the first and fourth toes directed backward the second and third forward