BBS Route · California · BCR 5
Offield Mtn Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 77 species recorded across 35 survey years, still active.
77Species Recorded
35Years Surveyed
1973–2014Span
5Observers
Bird Species Found on California Offield Mtn
Top 40 of 77 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Golden-crowned Kinglet | Regulidae | 34 | 2014 | +825% | 2002 | |
| Steller's Jay | Corvidae | 30 | 2014 | +80% | 1975 | |
| American Robin | Turdidae | 26 | 2014 | -25% | 1975 | |
| Hermit Thrush | Turdidae | 13 | 2014 | +20% | 1975 | |
| Lazuli Bunting | Cardinalidae | 11 | 2013 | +29% | 1975 | |
| Red-breasted Nuthatch | Sittidae | 10 | 2014 | +39% | 1975 | |
| Orange-crowned Warbler | Parulidae | 10 | 2014 | +400% | 1989 | |
| Spotted Towhee | Passerellidae | 9 | 2014 | +100% | 1976 | |
| Pine Siskin | Fringillidae | 9 | 2009 | +800% | 1975 | |
| Western Tanager | Cardinalidae | 8 | 2014 | -38% | 1975 | |
| Hairy Woodpecker | Picidae | 6 | 2014 | +57% | 1975 | |
| Black-headed Grosbeak | Cardinalidae | 6 | 2014 | -10% | 1975 | |
| Cassin's Vireo | Vireonidae | 5 | 2014 | -42% | 1975 | |
| Acorn Woodpecker | Picidae | 5 | 2014 | +133% | 1977 | |
| Brown Creeper | Certhiidae | 5 | 2014 | +117% | 1980 | |
| Downy Woodpecker | Picidae | 5 | 2013 | +400% | 2011 | |
| Pileated Woodpecker | Picidae | 4 | 2013 | +50% | 1976 | |
| California Scrub-Jay | Corvidae | 4 | 2014 | +233% | 1978 | |
| Pacific Wren | Troglodytidae | 3 | 2013 | -8% | 1976 | |
| Chestnut-backed Chickadee | Paridae | 3 | 2014 | -26% | 1975 | |
| California Quail | Odontophoridae | 3 | 2014 | +0% | 1976 | |
| Nashville Warbler | Parulidae | 3 | 2014 | +50% | 1977 | |
| Yellow Warbler | Parulidae | 3 | 1974 | n/a | n/a | |
| Swainson's Thrush | Turdidae | 3 | 2012 | +25% | 1977 | |
| Common Raven | Corvidae | 3 | 2013 | -40% | 1978 | |
| Wrentit | Sylviidae | 3 | 2014 | -13% | 1982 | |
| Mountain Quail | Odontophoridae | 3 | 2014 | +33% | 1984 | |
| Cooper's Hawk | Accipitridae | 2 | 1978 | +100% | 1973 | |
| American Kestrel | Falconidae | 2 | 1973 | n/a | n/a | |
| Western Wood-Pewee | Tyrannidae | 2 | 2011 | -62% | 1975 | |
| Red-breasted Sapsucker | Picidae | 2 | 2013 | -46% | 1976 | |
| Hammond's Flycatcher | Tyrannidae | 2 | 2014 | +14% | 1978 | |
| Warbling Vireo | Vireonidae | 2 | 2014 | -60% | 1977 | |
| Lincoln's Sparrow | Passerellidae | 2 | 2014 | +0% | 1978 | |
| Townsend's Solitaire | Turdidae | 2 | 2012 | +50% | 1983 | |
| Blue-gray Gnatcatcher | Polioptilidae | 2 | 2003 | +0% | 1995 | |
| Green-tailed Towhee | Passerellidae | 2 | 2000 | n/a | n/a | |
| Canada Jay | Corvidae | 2 | 2009 | n/a | n/a | |
| Red-shouldered Hawk | Accipitridae | 2 | 2014 | n/a | n/a | |
| Mourning Dove | Columbidae | 1 | 2011 | -20% | 1976 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.