Montezuma Oropendola
Montezuma Oropendolas (Psarocolius montezuma)are highly dimorphic in size; males may be up twice the weight of females. This species is polygynous, and dominant 'alpha' males perform most copulations at a colony (although subordinate males apparently are able to copulate with some females, presumably away from the colony and the presence of the alpha male). They are nests colonially, in colonies of up to 130 nests, often in isolated large trees; such a setting makes the clusters large, hanging, basket-like nests even more conspicuous. The loud, gurgling song of the male is given as the male bows forward, cocking the tail and spreading the wings (Birds of the world).
Montezuma Oropendola
Montezuma Oropendolas (Psarocolius montezuma)are highly dimorphic in size; males may be up twice the weight of females. This species is polygynous, and dominant 'alpha' males perform most copulations at a colony (although subordinate males apparently are able to copulate with some females, presumably away from the colony and the presence of the alpha male). They are nests colonially, in colonies of up to 130 nests, often in isolated large trees; such a setting makes the clusters large, hanging, basket-like nests even more conspicuous. The loud, gurgling song of the male is given as the male bows forward, cocking the tail and spreading the wings (Birds of the world).