Migratory Birds of the Great Lakes University of Wisconsin Sea Grant Institute
 about habitat birds + science 20 birds
aerialist raptors
copyright UW Sea Grant, writer: L. Wiland, design: T. Yao contact us credits

Marsh Wren — Nest and Eggs

Marsh Wren nests are softball-sized structures made of grasses and sedges, fashioned with an entrance hole that usually faces south or west. The nests are attached to the stems of marsh vegetation such as cattails or bulrushes, and are located from one to three feet above water level. Males may build up to half a dozen partially completed nests on their territory prior to female arrival.

These nests are usually grouped in a small area called the courting center. When a female approaches a male’s territory he flies over to her and sings. If she enters his territory the male will show her several nests he has constructed, and if she chooses to mate with the male she may line a nest with strips of grass, small stems, cattail downs, feathers and rootlets or she may build an entirely new nest. Each male usually has a number of mates.         Eggs >>