Bean- to egg-shaped male gonads located in the body cavity; they produce sperm and sex hormones and enlarge markedly during the breeding season.
Horny structure at the end of the toe.
Constitution type characterized by a fine skeleton, dry joints, fine, seemingly ...
Control involving evaluation of the quality of hatching eggs and analysis of dea...
Technological term for the body part of a slaughtered bird including the pelvic ...
A fully developed and mobile third eyelid in birds; in the open eye this thin el...
Symbol for the amino acid threonine.