MIGRATION TIME

When migration time came birds immigrates.Actually in animal kingdom only birds don't immigrate.Elephants, zebras, some insects, soda fish lobsters and many more animals migrate. But the migration of birds is the most interesting.Because they always fly over us, the birds bleed to those on Earth. Scientists who study migratory birds are most curious about the answer to the following question: "Why do some birds migrate, while others do not?" For example, why do swallows leave but sparrows do not?

In fact, the answer to this question is not known exactly. Just like when we get sleepy at night, when the time of migration comes, some birds will migrate. And they start preparations for the journey. There will be some changes in their body.

Birds' ears are like barometers, so they know how high they are from the ground. If our ears were like birds' ears, we would know which floor we are in an apartment.At the same time, birds know the weather with their ears. So they know when the weather will break or when it will snow. So they can prepare in advance.