Do wintering Harlequin Ducks Forage Nocturnally at High Latitudes
The Condor 107: 173-177
Cooper Ornithological Society
The Condor 107: 173-177
Cooper Ornithological Society
At the inception of the SDJV, the lack of understanding about population delineation was seen as one of the highest priority topics for future work; this priority was confirmed during a 2010 review of program direction. Identifying links among breeding, molting, staging, and wintering areas will help improve the design of monitoring surveys and interpretation of trends, and more effectively direct management actions.
Twelve species of North American sea ducks (Tribe Mergini) winter off the eastern coast of the United States and Canada. Yet, despite their seasonal proximity to urbanized areas in this region, there is limited information on patterns of wintering sea duck habitat use. It is difficult to gather information on sea ducks because of the relative inaccessibility of their offshore locations, their high degree of mobility, and their aggregated distributions.
The fifteen species of sea ducks (Tribe Mergini) are the most poorly understood group of waterfowl in North America. The most basic biological information is unknown for some species. Few species have reliable population indices or estimates of annual productivity, and much of our knowledge is based on a very few, localized studies. Also, current survey design is unable to accurately estimate sea duck harvest.
Black and white-winged scoters are not federally listed species but are protected under the
Migratory Bird Treaty Act. The North American Waterfowl Management Plan (2004) lists all
scoter species as decreasing in numbers in North America.
North American populations of breeding surf scoters and long-tailed ducks appear to be decreasing. Along the Atlantic coast, wintering populations of surf scoters are suspected to be decreasing, while the status of wintering populations of long-tailed ducks remains unknown. These trends have led conservation organizations to assign a "high" relative conservation priority to both species.
Ornis Scandinavica 19: 249-256
More than 90% of the world’s population of Barrow’s Goldeneye (Bucephala islandica) breeds from central Alaska to northern California (Robert et al. 2000). The species also breeds in Iceland, where the population is estimated at approximately 2000 birds (Robert et al. 2000). There has also been a small population associated with eastern North America, however, historically, breeding records have been sparse and, in many cases, unconfirmed (Bellrose 1980). Robert et al.
Sixty seven Abstracts 45 posters presented 12-16 September 2011 in Seward Alaska
King Eider Bibliography 45 records