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Tip: press play to see the sound's live frequency spectrum in blue over the waveform.
About this sound
A Pacific wren sings from 0 to 7.5 seconds. A varied thrush sings at approximately 0 to 1 seconds and 7 to 8 seconds. Another species, possibly an American crow, vocalizes at around 3 to 4 seconds. From "Eavesdropping (on Birds) Has a Smart New Tool," Park Science magazine, Winter 2022 issue (December 30, 2022).
Why parks record sound
The NPS Natural Sounds and Night Skies Division monitors soundscapes in parks across the United States. Natural quiet is treated as a resource to protect, like clean air or dark skies: noise from aircraft, vehicles and machinery can mask animal communication and change the experience of a place.
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Sources & credits
- BirdNET audio from Bartlett Cove, Glacier Bay National Park and Preserve, spring 2022 by US National Park Service – Public domain