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Providing evidence to improve practice

Individual study: Effects of removal of medium-sized mammalian nest predators on nest survival of grassland songbirds in eastern North Dakota, USA

Published source details

Dion N., Hobson K.A. & Larivière S. (1999) Effects of removing duck-nest predators on nesting success of grassland songbirds. Canadian Journal of Zoology, 77, 1801-1806


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

Control predators not on islands for songbirds Bird Conservation

A randomised, replicated and controlled trial conducted over two breeding seasons in North Dakota, USA (Dion et al. 1999), found no significant difference in the daily survival rates of songbird nests at eight sites where medium-sized mammalian nest predators had been removed compared with eight control sites. Species removed were red fox Vulpes vulpes, striped skunk Mephitis mephitis, raccoon Procyon lotor and American badger Taxidea taxus. Observations from artificial nests suggest that compensatory predation by smaller mammal species (such as ground squirrels Spermophilus spp.) may have counteracted any effects of target predator removal.