Question

Physiological preparation of migration in birds include ​

Answer 1

Answer:

Birds like swifts and swallows store very little fuel as they can feed while they fly. Most energy is stored in the form of fat, which is built up before the journey and used en route, with refuelling at stopping off places if needed.

Explanation:

Answer 2

Answer:

Physiological stimulus of migration

Migration, like reproduction and other phases (as molting in birds), is part of the life cycle and depends on a complex internal rhythm that affects the whole organism, particularly the endocrine glands (glands of internal secretion) and the gonads. Migration must thus be viewed in relation to the entire annual cycle.