A Region of the Canary Forebrain Shrinks During the Nonbreeding

question 59

Multiple Choice

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) renewal of mating and nest-building behaviors.
• E) elimination of the memorized template for songs sung the previous year.

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