Two hens, but a single nest: an unusual case of polygyny by Hen Harriers in Orkney
01 March 1983
Main paper
In June 1981,I was told of a nest of Hen Harrier Circus cyaneus on the East Mainland of Orkney with ten eggs, and two females in attendance. Since an unusually high percentage of first-year males (25%) bred on the West Mainland of Orkney in 1981, ...
Read More
