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Status of the western grebe (Aechmophorus occidentalis) in Alberta : update 2012

Description

This wildlife status report looks at the western grebe, a North American waterbird that winters on the Pacific coast and migrates inland to breed at the shallow margins of medium to large lakes... More ≫

Description

This wildlife status report looks at the western grebe, a North American waterbird that winters on the Pacific coast and migrates inland to breed at the shallow margins of medium to large lakes and wetlands. The species is local and uncommon in Alberta and is ranked as Sensitive, and in 2007 was designated as a Species of Special Concern. This report is part of the Alberta Wildlife Status Report series, which provides comprehensive summaries of selected wildlife species intended to be useful to those managing populations of species and their habitats, and to help identify species that may be formally designated as endangered or threatened.

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Status of the western grebe (Aechmophorus occidentalis) in Alberta [2006]

Description

This wildlife status report looks at the western grebe, a North American waterbird that winters on the Pacific coast and migrates inland to breed at the shallow margins of medium to large lakes... More ≫

Description

This wildlife status report looks at the western grebe, a North American waterbird that winters on the Pacific coast and migrates inland to breed at the shallow margins of medium to large lakes and wetlands. The species is local and uncommon in Alberta and is ranked as Sensitive based on the lack of data, the species' sensitivity to human disturbance, and habitat degradation. This report is part of the Alberta Wildlife Status Report series, which provides comprehensive summaries of selected wildlife species intended to be useful to those managing populations of species and their habitats, and to help identify species that may be formally designated as endangered or threatened.

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Western (Aechmophorus occidentalis) and eared (Podiceps nigricollis) grebes of central Alberta : 2002 field summary

Description

The information presented in this report represents the findings from the second year of surveying western and eared grebes within the Stony Plain study area in Alberta. The surveys are projected... More ≫

Description

The information presented in this report represents the findings from the second year of surveying western and eared grebes within the Stony Plain study area in Alberta. The surveys are projected to span a five year period and the project is designed to monitor population trends and reproductive success of western grebes and eared grebes within the Stony Plain study area. In 2002, surveying effort was focused on the primary grebe populations identified in the initial year of the project. The regional population of western grebes was estimated to be approximately 2611 adults on six lakes. The Wabamun Lake colony continues to show signs of poor nesting success, which we now believe to be attributed to high rates of corvid nest depredation. This is a major concern since this colony is ranked nationally significant. Eared grebes were found on 10 lakes, for a conservative overall population estimate of 8633 adults.

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