Ravens get married due to stress

Polish scientists from the biological station in the Bialowieza Forest managed to shed light on the family life of ravens, the BBC reported citing the journal «Biology Letters». It turns out that birds find refuge in the status of the full stress of public life.

Dr. Nuria Selva (Nuria Selva) and colleagues measured the levels of corticosterone (stress hormone) in birds of different age and marital status. It turned out that the young ravens holding large groups it is considerably higher than in adult birds that have already found a mate and live "their economy." The reason for this situation may be rivalries of youth within the pack - it is easy to see here an analogy with the attitude of the children in the classroom or youth "get-togethers." It is possible that such "charm" of life in the team and eventually pushing (ravens are not students) to to get his family. "We think the high level of stress causes the birds to leave the group," - said Dr. Selva.

This discovery is all the more surprising that until now was considered life zoologists Group lighter. In fact, for a large company better and to hunt and to defend the territory. However, the apparently complex nature of young ravens brings these advantages to zero.

Thus crows, enjoying a well-deserved reputation as the smartest birds are somewhat less social animals than not glittering intelligence bats. Latest knows what friendship and, moreover, are able to maintain it for years to come.

Source: www.vokrugsveta.ru

via factroom.ru