Wednesday, March 17, 2010

eBird Maps - Western Wood-Pewee Migration Pattern

Western Wood-Pewee - Photo by Jonathan Stoke

One of the more common Tyrant Flycatchers in my area is the Western Wood-Pewee.  I really struggle with identification of all the very similar flycatchers, but the I have learned well the call of the Western Wood-Pewee which is more reliable than my i.d. skills based on physical characteristics.

gif maker
Gif maker

Wintering along the northern edge of South America, the Western Wood-Pewee makes its way up from the southwestern states in April and rapidly expanding its range in May along with most of the other migrants.  The Western Wood-Pewee's range continues to expand into Canada and Alaska in June.  By July and August sightings of Wood-Pewees becomes more concentrated and by September the range is shrinking.  By October sightings are almost exclusively in the southwest.  There is even a two-week period in December that has zero Western Wood-Pewee sightings recorded in North America and Mexico, so they really do get to South America for the winter.

For more fascinating eBird data on the Western Wood-Pewee, click here!

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