Range. - Whole of North America, very abundant in all sections.
Pale bluish white.
The adult of this species is very light colored, and young birds of the first two years have a reddish brown coloration; in both plumages the species is easily identified by the white patch on the rump. They are, almost exclusively frequenters of fields and marshes, where they can most often be seen, towards dusk, swooping in broad curves near the ground, watching for field mice, which form the larger portion of their diet. Their nests are made in swampy ground, often in the middle of a large marsh, being placed on the ground in the centre of a hummock or clump of grass; it is generally well lined with grasses and often rushes. They lay from four to seven pale bluish white eggs, generally unmarked; size 1.80 x 1.40.
NEST AND EGGS OF MARSH HAWK.
(Adult and young) Marsh Hawk