In the winter, it mostly wanders nomadically or makes regular migrations.

Which of the following factor(s) help birds make successful migrations?

In some regions, it makes small local migrations.

They made long migrations along the wall of ice, moving south only in spring and summer.

Most species are sedentary though some make local migrations, typically to lower altitudes in winter.

It makes migrations within west Africa, according to the availability of the fruit, seeds and blossoms which make up its diet.

It makes small seasonal migrations, preferring lower altitudes during cold periods.

This species may make vertical migrations, approaching the surface at night to feed.

Many big game species in Alaska make long migrations between their seasonal ranges.

These fish make long migrations across the high seas and are fished by many nations.