Birdsong is commonly studied in male
A) white-crowned sparrows.
B) zebra finches.
C) canaries.
D) all of the above
E) none of the above
Question 2
Zebra finches and white-crowned sparrows are __________ birdsong learners; canaries are __________ birdsong learners.
A) age-limited; open-ended
B) rapid; slow
C) slow; rapid
D) open-ended; age-limited
E) closed-ended; age-limited