longer days in spring
longer days in spring
Birds that migrate generally do so on a North-South axis. Many birds that live on the Asian continent migrate throughout Asia. It would be unlikely, or "accidental," for birds from, for example, North America, to migrate to Asia.
WINTER.
It depends entirely upon the species but MOST migratory northern hemisphere birds migrate south, and MOST migratory southern hemisphere birds migrate north. But that is a huge over-simplification.
change in temperature
change in temperature! i do novanet as well ^_^
humming birds migrate the same way the other birds do. Like when it is cold in north they fly south and when it is cold in the south they fly north.
Birds migrate to Florida for winter because up north, the winter gets very cold and the birds don't like being so cold, so they fly south for winter where its not so cold as up north.
Changes in the day length. This can be understood as longer days in spring for some birds.
Birds that migrate are called migratory birds. Birds that do no migrate are called sedentary birds. Over 4000 species of birds migrate, mostly those native to colder regions.
They can migrate to different regions. The birds in the Northern hemisphere go south during winter. The birds in the Southern hemisphere go north during winter. They migrate towards the equator.
Wolves do not actually migrate but will follow herds of prey animals that pass through their territory.
Geese, robins, North American hummingbirds (particularly those in the eastern US), many passerine birds.