Interim Summary: Nesting Counts of Ospreys and Brown Pelicans in Northwestern Mexico, 2006
Open-File Report
2007-1212
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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.
Suggested Citation
Henny, C.J., and Anderson, D.W., 2007, Interim Summary: Nesting Counts of Ospreys and Brown Pelicans in Northwestern Mexico, 2006: U.S. Geological Survey Open-File Report 2007-1212, iii, 15 p., https://doi.org/10.3133/ofr20071212.
ISSN: 2331-1258 (online)
Study Area
| 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 |
| DOI | 10.3133/ofr20071212 |
| Year Published | 2007 |
| Language | ENGLISH |
| Publisher | Geological Survey (U.S.) |
| Contributing office(s) | Forest and Rangeland Ecosystem Science Center |
| Description | iii, 15 p. |