Our scientist found evidence, although she did not actually witness it, that this violent breeding behaviour can actually result in the death of some females.

The evidence for the different breeding behaviour gradually built up, and by 1938 there was no doubt that the two mutations were distinct.

Cuckoo search idealized such breeding behavior, and thus can be applied for various optimization problems.

This North American mystery bird is often the victim of another species' breeding behaviour.

Little is known about the species' breeding behavior, although juveniles have been observed in January and April.

Comparative breeding behavior of Lesser and Lawrence's goldfinches.

Here was adversity breeding compassionate behavior.

The electric eel is known for its unusual breeding behavior.

"Sumichrast's Scrub Jay" stands apart from the others in its altruistic breeding behavior.

This relatedness has likely played a role in the evolution of co-operative breeding behaviours amongst eiders.