Study

Effect of brown-headed cowbird Molothrus ater control on nesting success of Kirtland's warbler Dendroica kirtlandii on the Lower Peninsula, Michigan, USA

  • Published source details Kelly S.T. & DeCapita M.E. (1982) Cowbird control and its effect on Kirtland's warbler reproductive success. The Wilson Bulletin, 94, 363-365

Actions

This study is summarised as evidence for the following.

Action Category

Remove/control adult brood parasites

Action Link
Bird Conservation
  1. Remove/control adult brood parasites

    A before-and-after study in pine forests in Michigan, USA (Kelly & DeCapita 1982) found that the population of Kirtland’s warbler Dendroica kirtlandii did not significantly increase during 1972-81 when a total of 33,536 brown-headed cowbirds Molothrus ater (a brood parasite) were removed, compared to 1931-71, when no control was in place (average population of 207 individuals during 1975-81 vs. 201 for 1931-71). Population size remained similar despite parasitism rates being significantly lower and warbler productivity being significantly higher during the period with cowbird control (3.4% of nests parasitised and 2.8 chicks/nest fledged with cowbird control, number of nests not provided vs. 59% and less than 1 chick/nest fledged before control, 91 nests examined).

     

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Subscribe to our newsletter

Please add your details if you are interested in receiving updates from the Conservation Evidence team about new papers, synopses and opportunities.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust