Which White-eyed Vireo singing duty is shared by both males and females during the non-breeding season?
Answer
Singing on their wintering grounds
During the breeding season, the loud, expressive song used for territory defense and attracting mates is primarily the duty of the male, who sings vigorously nearly constantly from sunrise onward. However, this vocal behavior changes outside the breeding period. When the birds are on their wintering grounds in Central America or the southern US coastal plains, the vigorous singing duty is notably shared; both males and females participate in singing during this non-breeding season. The male's territorial singing role, however, remains restricted to the summer months.
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