Bird populations can be subdivided into different stages based on age, with the main categories juveniles, sub-adults, and adults (Figure 1). The age at which birds physiologically reach sexual maturity is species-specific. Generally, this age correlates with body size: at one extreme ...
auteur(s): A. Gyimesi, R. Lensink ; Bureau Waardenburg | Gyimesi, A. | Lensink, R.