Willow Flycatcher subspecies song discrimination experiment data

Sean Mahoney
Animals use acoustic signals to repel competitors and attract mates, and signal divergence among populations can promote reproductive isolation. Empidonax flycatchers are insectivorous passerine birds distributed across North and Central America that are conservative in plumage but often exhibit differences in song both between and within species. Four subspecies have been recognized within the Willow Flycatcher (Empidonax traillii) and previous analyses have revealed differences in song structure among a subset of these. Using reciprocal playback...
1 citation reported since publication in 2022.
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