Birds also know 'preservation'

The new study shows that the Kalahari desert, also known as tail-docking, acts as a member of a conservation band for other birds.

"Big brother" padded his tail.

According to a team of Bristol University , Cambridge (UK) experts and the new study, showing that the Kalahari desert, also known as tail-docking, acts as a member of a conservation band for other birds. Cape Town (South Africa), this study shows how two animals grow from parasitic to supportive relationships.

Lead researcher Dr. Andrew Radford said: ' By the Kalahari desert ( Dicrurus adsimilis ) is a parasitic bird that steals food from other species, you will think they are less revealed in the waiting time. However, it was surprisingly rowing right above the tall screaming birds searching for food below, and announcing their presence by emitting a characteristic cry for about 4-5 seconds. .

When the expert group played back a rowing sound for a group of screaming birds, they found them stretched over a wide range and had less neck uptake. This shows that they are less worried about predators when stalking birds are guarded. " We think that rowing has developed the ability to alert the birds to know their presence, to help this group of birds search for food more efficiently ," he added.

However, according to experts, no matter how useful the ' preservation ' service of rowing is, the prey birds respond better to the alarm calls of the same type. ' It is possible that the screaming bird does not trust the mafia to be as ridiculous as the animals of their species ', Mr. Radford said.

An in-depth study of complex co-evolution between animals provides scientists with ways to understand other important relationships, such as between drugs and bacteria. The study was published in the Evolution journal of the American Association for the Study of Evolution.