English: :Cut out long gaps and amplified the audio. Pine trees, oak trees, deciduous trees, and dry grassy field. Recorded near Highway 92, so there is a lot of traffic noise.
bird-seen:no
playback-used:no
Common name: Identity unknown
Type: life stage uncertain, sex uncertain, song
Genus: Mystery
Species: mystery
Location: San Francisco Peninsula (near San Mateo), San Mateo County, California
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