BBS Route · California · BCR 33
Onyx Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 116 species recorded across 22 survey years, still active.
116Species Recorded
22Years Surveyed
1968–2015Span
5Observers
Bird Species Found on California Onyx
Top 40 of 116 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| House Finch | Fringillidae | 65 | 2015 | +56% | 1970 | |
| Brewer's Blackbird | Icteridae | 54 | 2015 | -76% | 1970 | |
| Tricolored Blackbird | Icteridae | 42 | 1998 | -37% | 1972 | |
| Mourning Dove | Columbidae | 28 | 2015 | -6% | 1970 | |
| California Scrub-Jay | Corvidae | 27 | 2015 | +750% | 1970 | |
| Common Raven | Corvidae | 26 | 2015 | +101% | 1970 | |
| Yellow-headed Blackbird | Icteridae | 24 | 1980 | +243% | 1972 | |
| Cliff Swallow | Hirundinidae | 20 | 2015 | +47% | 1970 | |
| Western Kingbird | Tyrannidae | 18 | 2015 | +90% | 1970 | |
| Loggerhead Shrike | Laniidae | 17 | 2015 | +329% | 1970 | |
| Ash-throated Flycatcher | Tyrannidae | 16 | 2001 | 11× | 1972 | |
| Lark Sparrow | Passerellidae | 16 | 2015 | +375% | 1990 | |
| House Sparrow | Passeridae | 14 | 2015 | +185% | 1970 | |
| European Starling | Sturnidae | 9 | 2015 | -11% | 1970 | |
| Black-throated Sparrow | Passerellidae | 9 | 2001 | +142% | 1972 | |
| Bewick's Wren | Troglodytidae | 8 | 2001 | +186% | 1976 | |
| Mountain Quail | Odontophoridae | 8 | 1998 | +22% | 1980 | |
| Song Sparrow | Passerellidae | 7 | 2001 | +190% | 1970 | |
| Rock Wren | Troglodytidae | 7 | 2015 | +8% | 1970 | |
| California Quail | Odontophoridae | 6 | 2015 | +13% | 1970 | |
| Red-tailed Hawk | Accipitridae | 6 | 2015 | +43% | 1970 | |
| Northern Mockingbird | Mimidae | 6 | 2015 | +409% | 1970 | |
| Pine Siskin | Fringillidae | 6 | 1994 | n/a | n/a | |
| Common Poorwill | Caprimulgidae | 5 | 1998 | +100% | 1971 | |
| Spotted Towhee | Passerellidae | 5 | 2001 | +550% | 1976 | |
| Rock Pigeon | Columbidae | 5 | 1998 | -21% | 1976 | |
| Brewer's Sparrow | Passerellidae | 5 | 1998 | +175% | 1975 | |
| Bell's Sparrow | Passerellidae | 5 | 2015 | +140% | 1990 | |
| White-throated Swift | Apodidae | 4 | 1998 | -36% | 1970 | |
| Bullock's Oriole | Icteridae | 4 | 2015 | +58% | 1970 | |
| Lazuli Bunting | Cardinalidae | 4 | 2001 | +14% | 1990 | |
| Western Bluebird | Turdidae | 4 | 2001 | +91% | 1970 | |
| Blue Grosbeak | Cardinalidae | 4 | 2001 | +200% | 1972 | |
| Tree Swallow | Hirundinidae | 4 | 2001 | +250% | 1980 | |
| Nuttall's Woodpecker | Picidae | 4 | 2001 | +275% | 1980 | |
| American Kestrel | Falconidae | 3 | 2015 | -13% | 1970 | |
| Northern House Wren | Troglodytidae | 3 | 2001 | +367% | 1971 | |
| Anna's Hummingbird | Trochilidae | 3 | 1998 | +100% | 1978 | |
| American Goldfinch | Fringillidae | 3 | 1969 | n/a | n/a | |
| Wild Turkey | Phasianidae | 3 | 1998 | -63% | 1997 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.