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Title | Date | Type |
| 1 |
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Acadia National Park, Site ACADA02, National Park Service sound spectrograms | | Image |
| 2 |
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Badlands National Park, Site BADL001, National Park Service sound spectrogram | | Image |
| 3 |
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Badlands National Park, Site BADL001, National Park Service sound spectrograms | | Image |
| 4 |
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Bryce Canyon National Park, Site BRCA001, National Park Service sound spectrogram | | Image |
| 5 |
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Bryce Canyon National Park, Site BRCA001, National Park Service sound spectrogram | | Image |
| 6 |
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Bryce Canyon National Park, Site BRCA002, National Park Service sound spectrogram | | Image |
| 7 |
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Bryce Canyon National Park, site BRCABridgeHollow, National Park Service sound spectrograms | | Image |
| 8 |
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Bryce Canyon National Park, site BRCAFairyland, National Park Service sound spectrograms | | Image |
| 9 |
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Bryce Canyon National Park, site BRCAFairyland, National Park Service sound spectrograms | | Image |
| 10 |
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Bryce Canyon National Park, Site BRCAFairylandTrail, National Park Service sound spectrograms | | Image |
| 11 |
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Bryce Canyon National Park, Site BRCAFarview, National Park Service sound spectrograms | | Image |
| 12 |
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Bryce Canyon National Park, Site BRCAFarview, National Park Service sound spectrograms | | Image |
| 13 |
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Bryce Canyon National Park, Site BRCAFarview, National Park Service sound spectrograms | | Image |
| 14 |
 |
Devils Postpile National Monument, Site RAINBOW, National Park Service sound spectrograms | | Image |
| 15 |
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Golden Gate National Recreation Area, Site GOGA004MP3, National Park Service sound spectrograms | | Image |
| 16 |
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Grand Canyon National Park, Site GRCA006, National Park Service sound spectrograms | | Image |
| 17 |
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Grand Canyon National Park, Site GRCA007, National Park Service sound spectrograms | | Image |
| 18 |
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Grand Canyon National Park, Site GRCA008, National Park Service sound spectrograms | | Image |
| 19 |
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Grand Canyon National Park, Site GRCA008, National Park Service sound spectrograms | | Image |
| 20 |
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Grand Canyon National Park, Site GRCA010, National Park Service sound spectrograms | | Image |
| 21 |
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Grand Canyon National Park, Site GRCA010, National Park Service sound spectrograms | | Image |
| 22 |
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Grand Canyon National Park, Site GRCA011, National Park Service sound spectrograms | | Image |
| 23 |
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Grand Canyon National Park, Site GRCA011, National Park Service sound spectrograms | | Image |
| 24 |
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Grand Canyon National Park, Site GRCA012, National Park Service sound spectrograms | | Image |
| 25 |
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Grand Canyon National Park, Site GRCA013, National Park Service sound spectrograms | | Image |
| 26 |
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Grand Canyon National Park, Site GRCA014, National Park Service sound spectrograms | | Image |
| 27 |
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Grand Canyon National Park, Site GRCA015, National Park Service sound spectrograms | | Image |
| 28 |
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Grand Canyon National Park, Site GRCA016, National Park Service sound spectrograms | | Image |
| 29 |
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Grand Canyon National Park, Site GRCA017, National Park Service sound spectrograms | | Image |
| 30 |
 |
Grand Canyon National Park, Site GRCA018, National Park Service sound spectrograms | | Image |
| 31 |
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Grand Canyon National Park, Site GRCA020, National Park Service sound spectrograms | | Image |
| 32 |
 |
Grand Canyon National Park, Site GRCA020B, National Park Service sound spectrograms | | Image |
| 33 |
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Grand Canyon National Park, Site GRCA023, National Park Service sound spectrograms | | Image |
| 34 |
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Grand Canyon National Park, Site GRCA026, National Park Service sound spectrograms | | Image |
| 35 |
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Grand Canyon National Park, Site GRCA026B, National Park Service sound spectrograms | | Image |
| 36 |
 |
Grand Canyon National Park, Site GRCA029, National Park Service sound spectrograms | | Image |
| 37 |
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Grand Canyon National Park, Site GRCA029A, National Park Service sound spectrograms | | Image |
| 38 |
 |
Grand Canyon National Park, Site GRCA030, National Park Service sound spectrograms | | Image |
| 39 |
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Grand Canyon National Park, Site GRCA030B, National Park Service sound spectrograms | | Image |
| 40 |
 |
Great Basin National Park, Site GRBA, National Park Service sound spectrograms | | Image |
| 41 |
 |
Great Basin National Park, Site GRBA001, National Park Service sound spectrograms | | Image |
| 42 |
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Great Smoky Mountains National Park, Site GRSM001, National Park Service sound spectrograms | | Image |
| 43 |
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Great Smoky Mountains National Park, Site GRSM001, National Park Service sound spectrograms | | Image |
| 44 |
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Great Smoky Mountains National Park, Site GRSM002, National Park Service sound spectrograms | | Image |
| 45 |
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Great Smoky Mountains National Park, Site GRSM002, National Park Service sound spectrograms | | Image |
| 46 |
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Great Smoky Mountains National Park, Site GRSM003, National Park Service sound spectrograms | | Image |
| 47 |
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Great Smoky Mountains National Park, Site GRSM003, National Park Service sound spectrograms | | Image |
| 48 |
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Great Smoky Mountains National Park, Site GRSM004, National Park Service sound spectrograms | | Image |
| 49 |
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Great Smoky Mountains National Park, Site GRSM004, National Park Service sound spectrograms | | Image |
| 50 |
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Great Smoky Mountains National Park, Site GRSM005, National Park Service sound spectrograms | | Image |
| 51 |
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Great Smoky Mountains National Park, Site GRSM005, National Park Service sound spectrograms | | Image |
| 52 |
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Great Smoky Mountains National Park, Site GRSM006, National Park Service sound spectrograms | | Image |
| 53 |
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Great Smoky Mountains National Park, Site GRSM006, National Park Service sound spectrograms | | Image |
| 54 |
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Great Smoky Mountains National Park, Site GRSM007, National Park Service sound spectrograms | | Image |
| 55 |
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Great Smoky Mountains National Park, Site GRSM007, National Park Service sound spectrograms | | Image |
| 56 |
 |
Great Smoky Mountains National Park, Site GRSM008, National Park Service sound | | Image |
| 57 |
 |
Great Smoky Mountains National Park, Site SM01, National Park Service sound spectrograms | | Image |
| 58 |
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Great Smoky Mountains National Park, Site SM02, National Park Service sound spectrograms | | Image |
| 59 |
 |
Haleakala National Park, Site HALE001, National Park Service sound spectrograms | | Image |
| 60 |
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Haleakala National Park, Site HALE002, National Park Service sound spectrograms | | Image |
| 61 |
 |
Haleakala National Park, Site HALE003, National Park Service sound spectrograms | | Image |
| 62 |
 |
Haleakala National Park, Site HALEP01, National Park Service sound spectrograms | | Image |
| 63 |
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Haleakala National Park, Site HALEP02, National Park Service sound spectrograms | | Image |
| 64 |
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Haleakala National Park, Site HALEP03, National Park Service sound spectrograms | | Image |
| 65 |
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Haleakala National Park, Site HALEST4, National Park Service sound spectrograms | | Image |
| 66 |
 |
Haleakala National Park, Site HALEST5, National Park Service sound spectrograms | | Image |
| 67 |
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Haleakala National Park, Site HALEST6, National Park Service sound spectrograms | | Image |
| 68 |
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Haleakala National Park, Site HALEST7, National Park Service sound spectrograms | | Image |
| 69 |
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Haleakala National Park, Site HALEST8, National Park Service sound spectrograms | | Image |
| 70 |
 |
Haleakala National Park, Site HALEST9, National Park Service sound spectrograms | | Image |
| 71 |
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Hawaii Volcanoes National Park, Site HAVO001, National Park Service sound spectrograms | 2008 | Image |
| 72 |
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Hawaii Volcanoes National Park, Site HAVO002, National Park Service sound spectrograms | | Image |
| 73 |
 |
Hawaii Volcanoes National Park, Site HAVO1A1, National Park Service sound spectrograms | | Image |
| 74 |
 |
Hawaii Volcanoes National Park, Site HAVO1B1, National Park Service sound spectrograms | | Image |
| 75 |
 |
Hawaii Volcanoes National Park, Site HAVO2A1, National Park Service sound spectrograms | | Image |
| 76 |
 |
Hawaii Volcanoes National Park, Site HAVO2A1, National Park Service sound spectrograms | | Image |
| 77 |
 |
Hawaii Volcanoes National Park, Site HAVO2B1, National Park Service sound spectrograms | | Image |
| 78 |
 |
Hawaii Volcanoes National Park, Site HAVO2C1, National Park Service sound spectrograms | | Image |
| 79 |
 |
Hawaii Volcanoes National Park, Site HAVO3A1, National Park Service sound spectrograms | | Image |
| 80 |
 |
Hawaii Volcanoes National Park, Site HAVO3AI, National Park Service sound spectrograms | | Image |
| 81 |
 |
Hawaii Volcanoes National Park, Site HAVO3BI, National Park Service sound spectrograms | | Image |
| 82 |
 |
Hawaii Volcanoes National Park, Site HAVO3C1, National Park Service sound spectrograms | | Image |
| 83 |
 |
Hawaii Volcanoes National Park, Site HAVO3D1, National Park Service sound spectrograms | | Image |
| 84 |
 |
Hawaii Volcanoes National Park, Site HAVO4A1, National Park Service sound spectrograms | | Image |
| 85 |
 |
Hawaii Volcanoes National Park, Site HAVO4A1, National Park Service sound spectrograms | | Image |
| 86 |
 |
Hawaii Volcanoes National Park, Site HAVO5A1, National Park Service sound spectrograms | | Image |
| 87 |
 |
Hawaii Volcanoes National Park, Site HAVO5A1, National Park Service sound spectrograms | | Image |
| 88 |
 |
Hawaii Volcanoes National Park, Site HAVO5B1, National Park Service sound spectrograms | | Image |
| 89 |
 |
Hawaii Volcanoes National Park, Site HAVO5C1, National Park Service sound spectrograms | | Image |
| 90 |
 |
Hawaii Volcanoes National Park, Site HAVO6A1, National Park Service sound spectrograms | | Image |
| 91 |
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Hawaii Volcanoes National Park, Site HAVO6A1, National Park Service sound spectrograms | | Image |
| 92 |
 |
Hawaii Volcanoes National Park, Site HAVO6B1, National Park Service sound spectrograms | | Image |
| 93 |
 |
Hawaii Volcanoes National Park, Site HAVO6B1, National Park Service sound spectrograms | | Image |
| 94 |
 |
Hawaii Volcanoes National Park, Site HAVO6C1, National Park Service sound spectrograms | | Image |
| 95 |
 |
Hawaii Volcanoes National Park, Site HAVO8A1, National Park Service sound spectrograms | | Image |
| 96 |
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Hawaii Volcanoes National Park, Site HAVO8A1, National Park Service sound spectrograms | | Image |
| 97 |
 |
Hawaii Volcanoes National Park, Site HAVO8B1, National Park Service sound spectrograms | | Image |
| 98 |
 |
Hawaii Volcanoes National Park, Site HAVO8C1, National Park Service sound spectrograms | | Image |
| 99 |
 |
Hawaii Volcanoes National Park, Site HAVO9A1, National Park Service sound spectrograms | | Image |
| 100 |
 |
Hawaii Volcanoes National Park, Site HAVO9A1, National Park Service sound spectrograms | | Image |
