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This is the time of year to get out and look for regular but low-frequency migrants like Mourning Warbler and Olive-sided Flycatcher, and for spectacular longshots like Sulphur-bellied Flycatcher. It's also the time to try to document migrants that are probably a little more common than we realize, like Bell's Vireo.
Bell's Vireos are hard to find even when you know they're around, and chances are that a few pass through when we're not around, these hot dry days of migration when fall birding is still just a gleam in many birders' eyes. Bell's are also drab, so a quick look at one of them isn't the slam dunk that a look at a male Mourning Warbler might be.
Story continues here.
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