Image: Summer breeding and winter ranges of Willow Flycatcher subspecies from Sogge et al, USGS 2010
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Description: Summer breeding and winter ranges of Willow Flycatcher (Empidonax traillii) subspecies in western North America. from USGS survey protocol.
Title: Summer breeding and winter ranges of Willow Flycatcher subspecies from Sogge et al, USGS 2010
Credit: USGS Southwestern Willow Flycatcher survey protocol (http://pubs.usgs.gov/tm/tm2a10/pdf/tm2a10.pdf) map on page 3
Author: Mark A. Sogge
Usage Terms: Public domain
License: Public domain
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