You are here: Home
/ Publication Information
Title: Effects of predation and competitor interference on nesting success of house wrens and tree swallows
Author: Finch, Deborah M.;
Source: The Condor. 92(3): 674-687.
Publication Series: Scientific Journal (JRNL)
Description: I examined the relationships among brood survival in House Wrens (Troglodytes aedon) and Tree Swallows (Tachycineta bicolor) and rates of nest-box use, species interference, and nest predation. Tree Swallows nested in boxes in one of three woodlands occupied by House Wrens. Over a 4-year period, clutch mortality rates in swallows were significantly higher than those in wrens, but wrens on swallow-free plots had lower failure rates than wrens that coexisted with swallows. Though conspecifics interfered at 9 of 99 (9%) wren nests, predation was the major cause of wren nest failure, accounting for 70% of 27 unsuccessful attempts. Increased nest failure in wrens was associated with increased rates of box use. In contrast, clutch mortality in Tree Swallows was related to nest interference by wrens. Of 29 swallow nests, 13 (45%) showed signs of interference by wrens, and eight of these 13 (62%) were initiated in boxes containing empty "dummy" nests built earlier by wrens. House Wrens are interference competitors because they exclude swallows from boxes by destroying swallow nests. Destroying nests of other species has advantages for wrens if high concentrations of empty nests, including dummy nests, inhibits search efficiency of predators. An experimental approach is recommended for testing the hypothesis that House Wrens build dummy nests and destroy heterospecific nests because empty nests deceive predators.
Keywords: interference competition, clutch mortality, nest predation, box-use rate, dummy nest, riparian woodlands, House Wren, Troglodytes aedon, Tree Swallow, Tachycineta bicolor
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
XML: View XML
Finch, Deborah M. 1990. Effects of predation and competitor interference on nesting success of house wrens and tree swallows. The Condor. 92(3): 674-687.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility