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4 results

Topics: Environment Tags: shrikes species at risk

Views: 23
Updated

December 1, 2013

Description

In Alberta, the loggerhead shrike is considered to be a Species of Special Concern. Since 1987, a prairie-wide roadside survey has been conducted every five years to monitor populations. This report summarizes results of the 2013 survey conducted in Alberta, and compares results with surveys...


Views: 15
Updated

October 1, 2004

Description

In Alberta, the loggerhead shrike is considered to be a Species of Special Concern. Since 1987, a prairie-wide roadside survey has been conducted every five years to monitor populations. This report summarizes results of the 2003 survey conducted in Alberta. Observers recorded 168 shrikes at 144...


Views: 8
Updated

March 1, 2003

Description

The loggerhead shrike is considered to be a Species of Special Concern. A variety of survey techniques have been used to monitor population size and distribution of shrikes in Alberta. These include Breeding Bird Surveys, surveys conducted from moving vehicles, ground searches of roadside...


Views: 7
Updated

March 1, 2002

Description

Populations of the loggerhead shrike have declined markedly in many areas of North America in recent years. In Alberta, the species is now absent from much of the central aspen parkland, and is considered to be a Species of Special Concern in the province. In the central areas of the province,...