Migratory Birds of the Great Lakes University of Wisconsin Sea Grant Institute
 about habitat birds + science 20 birds
aerialist raptors
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Northern Harrier — Nest and Eggs

Northern Harriers build nests on the ground, often on slightly raised mounds surrounded by grass, cattails or tall vegetation. The nest itself is a shallow depression lined with grass, sticks and cattails and measuring 15-30 inches in diameter. Females incubate 4-6 bluish white eggs for 30-32 days, and chicks fledge about 30 days after hatching.