zy·go·dac·tyl 
(zī′gə-dăktĭl, zĭg′ə-)
(zī′gə-dăktĭl, zĭg′ə-)adj. also zy·go·dac·ty·lous (-tə-ləs)
Having two toes projecting forward and two projecting backward, as certain climbing birds.
n.
A zygodactyl bird, such as a parrot.
zy′go·dacty·ly (-tə-lē) n.