BBS Route · California · BCR 32
Tranquillity Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 74 species recorded across 24 survey years, still active.
74Species Recorded
24Years Surveyed
1972–2024Span
7Observers
Bird Species Found on California Tranquillity
Top 40 of 74 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| House Finch | Fringillidae | 138 | 2024 | 30× | 1974 | |
| Cliff Swallow | Hirundinidae | 108 | 2024 | +27% | 1974 | |
| Barn Swallow | Hirundinidae | 107 | 2024 | +326% | 1975 | |
| Red-winged Blackbird | Icteridae | 96 | 2024 | -63% | 1974 | |
| Mourning Dove | Columbidae | 73 | 2024 | +28% | 1974 | |
| Western Kingbird | Tyrannidae | 65 | 2024 | +619% | 1974 | |
| Brewer's Blackbird | Icteridae | 31 | 2024 | -10% | 1974 | |
| House Sparrow | Passeridae | 26 | 2024 | -48% | 1974 | |
| Northern Mockingbird | Mimidae | 24 | 2024 | +224% | 1974 | |
| Cinnamon Teal | Anatidae | 21 | 2001 | +263% | 1976 | |
| Western Meadowlark | Icteridae | 21 | 2024 | -73% | 1974 | |
| Loggerhead Shrike | Laniidae | 16 | 2004 | -65% | 1974 | |
| Burrowing Owl | Strigidae | 15 | 2004 | +59% | 1975 | |
| European Starling | Sturnidae | 15 | 2024 | -87% | 1974 | |
| American Robin | Turdidae | 14 | 2024 | +417% | 1975 | |
| Ring-necked Pheasant | Phasianidae | 13 | 2004 | -58% | 1974 | |
| Lawrence's Goldfinch | Fringillidae | 13 | 2024 | 13× | 1995 | |
| Eurasian Collared-Dove | Columbidae | 12 | 2024 | +9% | 2023 | |
| Killdeer | Charadriidae | 11 | 2024 | -68% | 1974 | |
| Brown-headed Cowbird | Icteridae | 10 | 2024 | -25% | 1974 | |
| American Crow | Corvidae | 9 | 2024 | +933% | 1976 | |
| Western Cattle-Egret | Ardeidae | 8 | 2001 | -68% | 1985 | |
| Red-tailed Hawk | Accipitridae | 7 | 2024 | +260% | 1981 | |
| Great Egret | Ardeidae | 6 | 2023 | +150% | 1975 | |
| American Avocet | Recurvirostridae | 4 | 2000 | -47% | 1974 | |
| Tricolored Blackbird | Icteridae | 4 | 2024 | -36% | 1974 | |
| Song Sparrow | Passerellidae | 4 | 2024 | +67% | 1974 | |
| Tree Swallow | Hirundinidae | 4 | 2000 | +33% | 1976 | |
| American Goldfinch | Fringillidae | 4 | 2024 | +300% | 1977 | |
| Common Raven | Corvidae | 4 | 2004 | -58% | 2001 | |
| Canvasback | Anatidae | 3 | 1972 | n/a | n/a | |
| Northern Harrier | Accipitridae | 3 | 2004 | -7% | 1974 | |
| Yellow-headed Blackbird | Icteridae | 3 | 1998 | -88% | 1974 | |
| Lark Sparrow | Passerellidae | 3 | 2023 | +14% | 1975 | |
| Redhead | Anatidae | 3 | 1997 | +0% | 1974 | |
| Rock Pigeon | Columbidae | 3 | 2023 | +277% | 1978 | |
| Marsh Wren | Troglodytidae | 3 | 2004 | -31% | 1978 | |
| California Scrub-Jay | Corvidae | 3 | 2004 | +0% | 1987 | |
| Black Tern | Laridae | 2 | 1995 | -71% | 1974 | |
| Northern Pintail | Anatidae | 2 | 1986 | -62% | 1974 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.