If a migratory bird is kept in a laboratory room with constant temperature and 12 hours of light each day, when does it show migratory restlessness?
A) steadily at all times
B) never
C) at approximately the correct time of year for migration
D) at random intervals throughout the year

Question

Quizplus · Accepted Answer

Migratory birds have an internal biological clock that triggers migratory restlessness at the appropriate time of year, even under constant environmental conditions.

If a Migratory Bird Is Kept in a Laboratory Room