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Patch size getting smaller in the Collared flycatcher, 15 years of study shows.
[caption id=“attachment_181” align=“alignnone” width=“640”] Photo by: Stefan Berdtsson (flickr) [/caption] See the small white forehead patch of the male Collared flycatcher in the photo? They are getting smaller and smaller.
Jan 27, 2017 1 min read animals