Why birds are hiding beak under wing
• What birds are hiding beak under a wing of
Feathering is not only one of the devices for the flight birds, but also the possibility to regulate body temperature. It creates an air layer between the external environment and the body. In cold conditions, this layer of air can store heat, and a hot - do not allow overheating. This can be compared with a thermos.
Due to the fact that the beak is not covered with feathers, the greatest heat loss go through it. If we look at the bird in the imager, against the blue cool outer layer of feathers clearly see a bright red beak.
It would seem not to be cold, the birds have to get dressed in feathers from head to toe, that is, from the beak to feet. But the presence of feathers on the beak would hurt the birds enough food, build nests and perform its other functions. There are birds with plumage is generally absent in the head, such as turkey or American vultures. There is an exit. If something can not cope physiology - helping behavior. That's why the birds are hiding their heads in the sand!
prove it environmentalists from Australia Deakin University. Within half a year, from winter to summer, they tracked nine shorebird species and found that in the cold season the birds are hiding beak under a wing considerably longer. Moreover, it was found that the length with which they do it, depends on the size of the beak. The higher it is - the longer the birds have to keep it under the wing to keep warm. Their findings, scientists have published in 2017 in the journal Functional Ecology.
However, the beak is not only cool, but also cool. poultry temperature is relatively stable, in contrast to the environment. If we look at the imager when the ambient temperature is above the bird's body temperature, we can see that the beak is colder than the surface of the tail is heated by the sun. That's why the birds are hiding beak under its wing not only in winter but in summer. The simple reason for this behavior opposite.