Assessing the effectiveness of predator exclosures for plovers

  • Published source details Mabee T.J. & Estelle V.B. (2000) Assessing the effectiveness of predator exclosures for plovers. The Wilson Bulletin, 112, 14-20.


This study is summarised as evidence for the following.

Action Category

Physically protect nests with individual exclosures/barriers or provide shelters for chicks of waders

Action Link
Bird Conservation
  1. Physically protect nests with individual exclosures/barriers or provide shelters for chicks of waders

    A small replicated, controlled study from 1994-95 on beaches and alkaline flats in Colorado, USA (Mabee & Estelle 2000) found that daily survival rates of 27 snowy plover Charadrius alexandrinus, 16 killdeer C. vociferous and 9 piping plover C. melodus nests (in 1994) and 28 snowy plover nests (in 1995) were no higher for nests protected by predator exclosures (61 cm tall, 122 cm in diameter cylinders of 5 x 5 cm or 5 x 10 cm wire mesh, for snowy and piping plover or killdeer respectively) than for unprotected nests (daily survival rates in 1994: 0.98 vs. 0.98 for snowy plovers; 0.97 vs. 0.99 for killdeer; 0.98 vs. 0.98 for piping plovers; in 1995: 0.98 vs. 0.97 for snowy plovers). Five protected nests (20%) were predated in 1994 and three (21%) in 1995, by snakes, rodents or skinks. The authors cite small sample sizes, unbalanced experimental design and ‘inappropriate statistical analyses’ as possible reasons for the lack of a significant result.


Output references
What Works 2021 cover

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, 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 19

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.

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