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Host Selection in the Forest Interior: Cowbirds Target Ground-Nesting Species
Entry ID: brdpwrc0018


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Summary
Abstract: We investigated patterns of cowbird host selection in a large (1300 ha),
unfragmented forest in eastern New York in 1992-3 to determine whether cowbird
parasitism rates can be attributed tospecies-specific traits or to other
features associated with nest sites. Nest height was significantly associated
with parasitism (P = 0.003) in this community of 23 species (n = 430 nests, 23%
parasitized). Further analysis revealed that the difference in mean nest
heights between parasitized and unparasitized nests was due to species
identity, and within each species there was no difference in mean nest heights
between parasitized and unparasitized nests. These results imply that during
1992-3 cowbirds in this forest specialized on species that have low nests and
did necessarily select low nests regardless of species. This was further
supported by a negative association across all 23 species between mean nest
height and parasitism rate (P = 0.03). Thus, although most of the
forest-nesting species in this community experienced cowbird parasitism, there
was a tendency for higher parasitism rates on low-nesting species such as the
Ovenbird, Black-and-white Warbler, Louisiana Waterthrush, Veery, and Hermit
Thrush. The Wood Thrush, a mid-range nester which is heavily parasitized in
southern Illinois, experienced only 10% parasitism in our site and ranked 9th
in parasitism rate, although it was the most abundant species in this forest in
terms of the number of nests found. A long-term study is necessary to determine
whether this cowbird population consistently parasitizes the ground-nesting
species of this forest community more often than those nesting at higher levels
or whether they periodically shift among hosts at different heights and in
different habitats across the local landscape.

Supplementary Information:
The information for this metadata was taken in part from the U.S. Geological
Survey, Biological Resources Division, Patuxent Wildlife Research Center
Research Showcase site for the appropriate data set


Geographic Description:
eastern New York


Purpose: To assess the effect of brood parasitism on neotropical migrants.

Related URL
Link: VIEW EXTENDED METADATA


Link: VIEW RELATED INFORMATION > PUBLICATIONS


Geographic Coverage
 N: 45.0 S: 34.0  E: -76.0  W: -80.0

Data Set Citation
Dataset Originator/Creator: D. Caldwell Hahn and Jeffrey S. Hatfield;U.S. Geological Survey, Biological Resources Division, Patuxent Wildlife Research Center;
Dataset Title: Host Selection in the Forest Interior: Cowbirds Target Ground-Nesting Species
Dataset Release Date: 1998
Dataset Release Place: Texas (book), Laurel, Maryland (data set)
Dataset Publisher: USGS, Biological Resources Division, Patuxent Wildlife Research Center


Temporal Coverage
Start Date: 1992-01-01
Stop Date: 1993-01-01


Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NORTHEAST


Science Keywords
BIOSPHERE >TERRESTRIAL ECOSYSTEMS >FORESTS    [Definition]
BIOLOGICAL CLASSIFICATION >ANIMALS/VERTEBRATES >BIRDS    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >SPECIES/POPULATION INTERACTIONS >SPECIES COMPETITION    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >SPECIES/POPULATION INTERACTIONS >PARASITISM    [Definition]


ISO Topic Category
BIOTA


Access Constraints
None


Use Constraints
None


Keywords
BROOD PARASITISM
COWBIRDS
EASTERN NEW YORK
NEOTROPICAL MIGRANTS
PATUXENT WILDLIFE RESEARCH CENTER
PWRC


Data Set Progress
COMPLETE


Originating Center
USGS/BRD/PWRC


Data Center
Patuxent Wildlife Research Center, Biological Resources Division, U.S. Geological Survey, U.S. Department of the Interior    [Information]
Data Center URL: http://www.pwrc.usgs.gov/

Data Center Personnel
Name: CALDWELL HAWN
Phone: 301-497-5653
Fax: 301-497-5724
Email: Caldwell_Hahn at usgs.gov
Contact Address:
USGS Patuxent Wildlife Research Center
11410 American Holly Drive
City: Laurel
Province or State: Maryland
Postal Code: 20708-4015
Country: USA


Personnel
CALDWELL HAWN
Role: TECHNICAL CONTACT
Phone: 301-497-5653
Fax: 301-497-5724
Email: Caldwell_Hahn at usgs.gov
Contact Address:
USGS Patuxent Wildlife Research Center
11410 American Holly Drive
City: Laurel
Province or State: Maryland
Postal Code: 20708-4015
Country: USA


TYLER B. STEVENS
Role: DIF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


Publications/References
Citation Information:
Originator: D. Caldwell Hahn and Jeffrey S. Hatfield
Publication Date: 1998
Title: Host Selection in the Forest Interior:
Cowbirds Target Ground-Nesting Species
Series Information:
Series Name: Ecology and Management of Cowbirds
Issue Identification: none
Publication Information:
Publication Place: Texas
Publisher: University of Texas

Creation and Review Dates
Last DIF Revision Date: 2014-04-03


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