Montagu’s Harrier — Circus Cineraceus (Montagu)
Although the commonest of our British Harriers, this species is nevertheless exceedingly scarce and local. It is a migrant, arriving towards the middle of April, and in some of the open moorlands and fenny localities in the south and south-east of England a few pairs yearly attempt to breed.
The sight of this grand bird, as it quarters the ground backwards and forwards in search of food, is an exquisite pleasure to the true naturalist, but in spite of the protection afforded by law, it is ruthlessly destroyed, either by the gamekeeper or the collector of British killed specimens, whenever seen. In habits it closely resembles the Hen Harrier. It nests on the ground, and its bluish white eggs are, as in the case of that species, often speckled with rusty red.
The upper parts, throat, and breast of the male are slaty grey; the hinder parts white, streaked with rufous on the flanks. Tail feathers greyish with five rusty red bars on all except the middle pair. The female, who is slightly larger than the male, is brown above and buff streaked with rufous below. The young resemble the female but are much darker below. Length about 18 in.; wing 15·4 in.
To Scotland and Ireland this bird is only a very rare straggler.