Large secondary-nesting birds such as ducks rely on appropriate cavities for breeding. The main objective of this study was to assess the availability of large cavities and the potential of a managed boreal coniferous landscape to provide nesting trees within the breeding area of the eastern population of Barrow’s Goldeneye (Bucephala islandica), a cavity-nesting species at risk in Canada.
The Alaska breeding population of Steller’s
Eider (Polysticta stelleri) was classified as
threatened under the Endangered Species Act in
June 1997 (USFWS 2002). Recent records suggest
that the species’ current breeding range in northern
Alaska has been greatly reduced and now is
restricted mostly to the vicinity of Barrow
(Quakenbush et al. 2002). Results of aerial surveys
in the past decade verify this distribution pattern
(e.g., Larned et al. 1999, Obritschkewitsch et al.
2008, Ritchie and King 2001).
Sixty seven Abstracts 45 posters presented 12-16 September 2011 in Seward Alaska
Seventy Abstracts of the Third North American Sea Duck Conference,
presented10-14 November 2008 Quebec City, Monteal, Canada
One hundred and five Abstracts of the Second North American Sea Duck Conference presented
in Annapolis Maryland 7-11 November, 2005
One hundred and eighteen Abstracts of the First North American Sea Duck Workshop and Conference
presented in Victoria, British Columbia, Canada 6-10 November, 2002
This report outlines the results of the internationally coordinated census of wintering waterbirds in the Baltic Sea 2007-2009 undertaken under the SOWBAS project (Status of wintering Waterbird populations in the Baltic Sea). The estimated total number of wintering waterbirds was 4.41 million compared to 7.44 million during the last co-ordinated census 1992-1993. Despite the general declines stable or increasing populations of herbivorous species were recorded.
During the 1980's, restrictive harvest regulations linked to declines in mid-continent duck populations and restrictions on black duck harvest led to a shift in hunting pressure to lesser-utilized species, such as sea ducks. Concern among Atlantic coast waterfowl biologists about this increase in pressure on sea ducks led to a variety of surveys in different areas being conducted at different times, using a variety of techniques that were not compatible.
Mapping North America's shared Environment
The North American Environmental Atlas is an interactive mapping tool to research, analyze and manage
environmental issues in Canada, United States and Mexico. All signers of the Migratory Bird Treaty.
Maps are downloadable free of charge and available in an easy to use map viewer format.
The CEC uses maps in the Atlas to:
•Identify priority areas to conserve biodiversity
•Track cross-border transfers of pollutants
•Monitor CO2 emissions across major transportation routes
The Patuxent Wildlife Research Center (PWRC) and American Bird Conservancy (ABC) have been working together to build a repository for storing Partners in Flight point count data as well as other point count datasets. The web-based Bird Point Count Database is now ready for use by anyone conducting monitoring programs using point counts. This includes bird point count data collected using standard protocols anywhere in North America (U.S., Canada, and U.S. Territories).