Harriers are a world-wide group of raptors whose mating systems, population dynamics and evolution are well-studied. This text synthesizes and analyzes the mass... » 

Harriers are a world-wide group of raptors whose mating systems, population dynamics and evolution are well-studied. This text synthesizes and analyzes the mass of data on the behavioural ecology of harriers offering a direct comparison of breeding systems in the northern and southern hemispheres. «