Fish camouflage sends mixed messages to aggro males

Colour-changing fish have only one skin, but they use it to communicate social status, attract mates, avoid predators and more. So what happens when those functions collide?

Review examines sexual aggression in mammals

A recent review of published studies in non-human mammals examines "sexual disturbance," or male behavior towards a female around mating that can be costly for the female—for example, that might inflict physical harm or ...

Social insecurity also stresses chimpanzees

An international team of researchers from the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, conducted behavioral observations and collected urine samples for cortisol analysis of male chimpanzees ...

Roosters are nicer to their relatives than to other males

Male domestic fowl are less aggressive towards related males than to unrelated males when competing for copulations, according to a new study from Linköping University in Sweden. This finding, which has been published in ...

Overcrowding forces pheasants to cooperate in Hawaii

"Survival of the fittest" usually means that animals put their own needs first, but occasionally it pays to work together. A new study in The Auk: Ornithological Advances describes an unusual example of cooperative breeding ...

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