It has been postulated that a special part of migratory birds' brains contain a magnetic material which keeps track of the bird's alignment with the magnetic field of the Earth.
They fly.
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.
To answer this question we need to know south or north of what.
love birds miograte down south, if you know what i mean ;]
Cause in the North it can get really cold and birds don't mostly survive in the cold so they fly south were it's warmer or hotter.
By banding the bird's leg with round metal tags, scientists have learned the migratory patterns of most species of birds. There are numbers on the tags so the scientists know where they started their journey and other scientists record these tag numbers in the south and vice versa when the birds fly north.
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.
The Wild Turkey and Muscovy Duck
do you seriously not know this? north is on the top of the world and south is on the bottom. its not that hard really...
Birds know when to migrate back north when the length of daylight increases.
scientists know that the people fannd out the north and south into mexico and central america
Most birds that migrate annually migrate south in the fall to spend the winter in warmer climates. For many birds, their bodies are not adapted to handle the cold weather and lack of food that winter tends to bring to most places. The birds that migrate south for the winter migrate north again in the spring because the weather is normally warmer in the spring and summer. The warmer temperatures make it easier for birds to breed and raise young without potentially losing their babies to the cold weather.