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Migrating birds’ use of stopover habitat in the southwestern United States

The Condor

By:
, , and
DOI: 10.1525/cond.2012.120020

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Abstract

In the arid Southwest, migratory birds are known to use riparian stopover habitats; we know less about how migrants use other habitat types during migratory stopover. Using radar data and satellite land-cover data, we determined the habitats with which birds are associated during migration stopover. Bird densities differed significantly by habitat type at all sites in at least one season. In parts of Arizona and New Mexico upland forest supported high densities of migrants, especially in fall. Developed habitat, in areas with little upland forest, also supported high densities of migrants. Scrub/shrub and grassland habitats supported low to intermediate densities, but because these habitat types dominate the Southwestern landscape, they may provide stopover habitat for larger numbers of migratory birds than previously recognized. These results are complicated by continuing challenges related to target identity (i.e., distinguishing among birds, arthropods and bats). Our results suggest that it is too simplistic to (1) consider the arid West as a largely inhospitable landscape in which there are only relatively small oases of habitat that provide the resources needed by all migrants, (2) think of western riparian and upland forests as supporting the majority of migrants in all cases, and (3) consider a particular habitat unimportant for stopover solely on the basis of low densities of migrants.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Migrating birds’ use of stopover habitat in the southwestern United States
Series title:
The Condor
DOI:
10.1525/cond.2012.120020
Volume
114
Issue:
4
Year Published:
2012
Language:
English
Publisher:
Cooper Ornithological Society
Publisher location:
Waco, TX
Contributing office(s):
Fort Collins Science Center
Description:
13 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
The Condor
First page:
698
Last page:
710
Country:
United States