A region of the canary forebrain shrinks during the nonbreeding season and enlarges when breeding season begins. This change is probably associated with the annual ________.
A) addition of new syllables to a canary's song repertoire
B) crystallization of subsong into adult songs
C) sensitive period in which canary parents imprint on new offspring
D) elimination of the memorized template for songs sung the previous year

Question

Quizplus · Accepted Answer

The enlargement of a region in the canary forebrain during the breeding season is associated with the addition of new syllables to a canary's song repertoire, as this is a time when canaries are more vocal and their songs become more complex to attract mates.

A Region of the Canary Forebrain Shrinks During the Nonbreeding