Kirtland's warbler (Dendroica kirtlandii) COSEWIC assessment and status report: chapter 1

Assessment Summary

Assessment Summary – April 2008

Common name : Kirtland’s Warbler

Scientific name : Dendroica kirtlandii

Status : Endangered

Reason for designation : This warbler is a globally endangered species that occurs in very small numbers in Ontario and possibly Quebec. It is a habitat specialist and extremely vulnerable to cowbird nest parasitism. Habitat management and cowbird control in Michigan, the core of its range, have resulted in population increases, which could provide a source of birds for Canada. However, the U.S. population is still small and the number of sightings in Canada has remained low and constant since 1990, so there is no evidence of rescue for the Canadian population.

Occurrence : Ontario

Status history : Designated Endangered in April 1979. Status re–examined and confirmed in April 1999, May 2000, and April 2008. Last assessment based on an update status report.

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