Ecology of Canada Warblers

Canada warbler populations have declined over the past 40 years but the factors responsible for this decline are unknown. This occurs for two reasons. First, Canada warblers are long-distance migrants so diagnosing which portion of the annual cycle limits population abundance, and hence likely responsible for the decline, represents a significant challenge because it requires that we follow individuals across more than a dozen countries. Second, Canada warblers are secretive and difficult to study in the field; the pessimist says this means that most attributes of their ecology are poorly known while the optimist says that almost every discovery is new to science.

March 30, 2016 Comments Off on Ecology of Canada Warblers

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