Naturesongs
Identification
Stelgidopteryx serripennis (northern rough-winged swallow)
Caption
Northern Rough-winged Swallows (Stelgidopteryx serripennis) reel in the Spring air above Tavasci Marsh [Arizona], calling as they fly - notice, as in most swallows, that they call most when the flock is the densest (a mechanism to help avoid collisions?).
- Type
- Sound
Contributors
Douglas Von Gausig (recordist; copyright holder), Naturesongs.com
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