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Providing evidence to improve practice

Individual study: Wild mallards Anas platyrhynchos successfully use artificial nests in wetland sites in Iowa, USA

Published source details

Bishop R.A. & Barratt R. (1970) Use of artificial nest baskets by mallards. The Journal of Wildlife Management, 34, 734-738

This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Provide artificial nesting sites for wildfowl Bird Conservation

A replicated study on a total of 11 marshland sites in Iowa, USA, in 1964-9 (Bishop & Barratt 1970) found that mallards Anas platyrhynchos used 33% of 705 artificial nests over the study period. The percentage of the mallard population using artificial nests increased from 31% in 1966 to 46% in 1969. Four other species (blue-winged teal A. discors, gadwall A. strepera, redheads Arytha americana and Canada geese Branta canadensis) used a total of 12 nests over the study period. Nesting success in artificial nests was 87%, far higher than previous records of mallard nest success (normally 27-52%). Nests were cone-shaped, hardware-cloth baskets, 18 cm deep and erected on poles sunk into marshland, dry land and in vegetation. Not all 11 sites were used every year.