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This recording shows more examples of type 2 flight calls but also includes some calls that we haven't managed to identify yet. They look vaguely like type 6 or 7 calls but aren't an obvious match. They were produced by a juvenile crossbill (photographed) that was mixed in with others. Uploaded 2016 July 24.
Detalles de la observación
Flight call type 2s. Audio recordings. Confirmed as type 2 by Matt Young at the Cornell Laboratory of Ornithology. The flight calls show multiple type 2 variants. The general pattern consists of short duration, downward-trending calls lasting about 0.05 seconds. Many of them have a characteristic kink in the middle or upper 2/3 of the call. Others have an inflection point instead of a kink. Others start at the inflection point and trend rapidly downward. Still others start at higher frequencies (pitches) and just slope diagonally downward with time. These are all examples of type 2 calls. Here's an audio spectrogram: Type 2 red crossbills have been documented with audio recordings in the San Gabriel Mountains, San Bernardino Mountains, San Jacinto Mountains, Santa Rosa Mountains, White Mountains, eastern Sierra Nevada, Frazier Mountain, and in Mt. Lassen National Park and should be expected in the southern Sierra Nevada in areas with Jeffrey pine, ponderosa pine, and lodgepole pine.
Información técnica
- Grabadora
- Olympus LS-10
- Micrófono
- Sennheiser MKE-400
- Accesorios
- Tamaño original del archivo
- 7.71 MB