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Mallard hatching from an egg cracked by freezing

January 1, 1969

The eggs of early-nesting waterfowl in North Dakota are frequently exposed to subfreezing temperatures. Mallards (Anas platyrhynchos) and Pintail (Anas acuta), normally the first ducks to arrive in the spring, begin limited early nesting in min-April. Nighttime temperatures during this period frequently drop below freezing, and late spring blizzards are not unusual.

Citation Information

Publication Year 1969
Title Mallard hatching from an egg cracked by freezing
DOI 10.2307/4083468
Authors R. J. Greenwood
Publication Type Article
Publication Subtype Journal Article
Series Title The Auk
Index ID 1001601
Record Source USGS Publications Warehouse
USGS Organization Northern Prairie Wildlife Research Center