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Interim Summary: Nesting Counts of Ospreys and Brown Pelicans in Northwestern Mexico, 2006

Open-File Report 2007-1212

By:
and

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Abstract

The distribution and abundance of nesting populations of California brown pelicans (Pelecanus occidentalis californicus) and ospreys (Pandion haliaetus) were documented in 2006 in northwestern Mexico. For ospreys only, the 2006 data were compared to population estimates from two previous surveys (one conducted in 1977 and another conducted in the period 1992-1993). Overall, the total osprey nesting population increased from 1977 to 1992-1993 and then only changed slightly by 2006, but included regions with localized declines, increases, and stable populations. Preliminary population estimates for California brown pelicans suggest a large and apparently healthy breeding population.

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Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Interim Summary: Nesting Counts of Ospreys and Brown Pelicans in Northwestern Mexico, 2006
Series title:
Open-File Report
Series number:
2007-1212
Edition:
-
Year Published:
2007
Language:
ENGLISH
Publisher:
Geological Survey (U.S.)
Contributing office(s):
Forest and Rangeland Ecosystem Science Center
Description:
iii, 15 p.