Question

in birds pendulum movement is initiated with :​

Answer 1

Explanation:

Birds migrate short distances on a regular basis for food.

Birds migrate short distances for mating but often return back.

Birds search for shelter in areas that are close to their current location where food is readily available.

Birds migrate long distances either during the summer or during the winter. This is triggered by a change in the length of daylight available which stimulates the endocrine glands of the birds, indicating that cold/ warm weather is approaching and that the bird must migrate to escape the unsuitable weather.