Rich Hoyer has posted photos and spectrograms of an apparent Calypte x Archilochus hummingbird at his blog this morning. A morning’s investigation convinced me that the sound file he posted does indeed provide good evidence that the bird at his feeder could be a hybrid, probably the progeny of a Black-chinned Hummingbird and a Costa’s Hummingbird. [Read more]
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While going through the Macaulay Library’s collection of Common Nighthawk vocalizations, I came upon something strange: a recording of what might be a hybrid Common x Antillean Nighthawk from south Florida. [Read more] |
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