1. Theories postulating that sexual task differentiation may lead to polygamy such that the sex investing the least effort in raising the offspring, engages in simultaneous matings, contrast with ...

Birds of prey may be thought of as fierce foes, but scientists find that some males disguise themselves as peaceful females. These males belong to a species of raptor known as the marsh harrier. Using ...

The owls and the harriers did not share the air space willingly. There were frequent aerial dogfights between the short-eared owl and the Northern harrier. Sometimes it looked to me as though the owl ...

The shapes were familiar, but under dark clouds it was a struggle to see the green heads of the drake mallards in the dim light of the sprawling northern Lake St. Clair marshes. Resident mallards ...

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The use of ringing recoveries -- a conventional method used to study bird migration -- in combination with more modern techniques such as species distribution modelling and stable isotope analysis is ...