Beak deformity in a Budgerigar.
Note how the lower beak appears short and heavily deformed, while
the upper beak looks fragile and chipped. One of the most common
causes of this type of deformity is infection with circovirus, the
etiological agent of Beak and Feather Disease.
Copyright © 2001 by MC
Peleteiro. M Pinho & JS Orvalho
design by R Noiva