Many species of birds migrate in winter. animals including bats, ground squirrels, and woodchucks hibernate in winter. which of the following do hibernation and migration have in common?

Ascientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at backyard bird feeders. what population is most likely to be a control group for the investigation? amount of food number of bird feeders invasive bird populations local backyard birdfeeders without food