indeed a beautiful sight we see each fall, when numerous flocks of birds fly away to warmer climes, and only a farewell cry for a long time reminds us of them.And we could not help raising his head and watching the receding jamb against the bright light of heaven.
And what birds fly south in the fall?And why did they leave us?And then come back in the spring?Surely each of us to ask these questions, looking at them.
reasons
Birds are warm-blooded creatures, their normal body temperature - about forty-one degrees.It would seem, and in winter they have to feel good.It is, however, when it is cold, many of them difficult to produce their own food, and some kinds of impossible.
Yet there are those who fly away due to frost.Therefore, sometimes risking their lives, the birds fly there, where they can keep more of their flocks and without problems to have offspring.Of course, many do not fly away due to lack of food, but also because of the upcoming cold weather.
What birds fly south in the fall not because of the food?They are called migratory.This is such a bird, a swallow, swift, lapwing, Finch, Mavis, Redstart, Golden Oriole, Common Chiffchaff, and others.
What other birds fly?Of course, plovers, rooks, piggy, starlings, oatmeal, Shrike, lapwings, skating Forest, warblers, robins, nightingales, black-headed grosbeak, flycatchers, herons, wagtails, swans, hoopoes, storks, larks, geese, ducks, cuckoos, robins.
But there are sedentary birds, they do not leave their homeland throughout the year.Taking a walk in the winter woods, you can see the sparrows, tits, jays and woodpeckers.
There is a bird that can not fly south in the fall and wander.They moved to a different location only when at the same conditions became unsuitable for living.In Russia, these birds can be attributed jay, bullfinch, crossbill, bird, nuthatch, schura, siskin, and other waxwing.Typically, these species live in the highlands, but with the onset of severe cold, they settle in the surrounding valleys.
What birds fly south in the fall, of course, but for some reason they tend to?Usually they move to where conditions are reminiscent of the terrain.For example, if they live in the steppes, then fly to the fields and meadows, if the forest - in the thicket.At the time of their flight could affect the weather, but usually they do it at the same time.Autumn departure begins when the chicks grow.Birds gather in flocks, and some leave their homes alone.
What birds fly south in autumn beautiful orderly shoals?
Probably each of us to ask a similar question to his parents.Of course, this crane.And, for example, the crows fly a chain.In some species, males leave the nest before the rest.
Basically they fly during the day, resting and eating at night, but there are those who do the opposite.Some birds do it pretty low, whereas other types of rising very high into the sky.
autumn birds fly south because of the changes that occur in their bodies.There is a theory that the culprit production of hormones that drive the birds to breed, as well as to ensure that they are removed from their homes with the onset of cold weather.However, science is not yet proven.
Conclusion
Birds amazing creation and very intelligent in nature, and we can only speculate why they fly south in autumn and then return back to delight us with their beauty and singing.
