BBS Route · California · BCR 32
Anza Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 95 species recorded across 18 survey years, no longer active.
95Species Recorded
18Years Surveyed
1970–2004Span
8Observers
Bird Species Found on California Anza
Top 40 of 95 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Brewer's Blackbird | Icteridae | 51 | 2004 | +54% | 1972 | |
| House Finch | Fringillidae | 41 | 2004 | +14% | 1972 | |
| California Scrub-Jay | Corvidae | 35 | 2004 | +14% | 1972 | |
| Cliff Swallow | Hirundinidae | 28 | 2004 | +19% | 1972 | |
| Common Raven | Corvidae | 27 | 2004 | +165% | 1972 | |
| California Towhee | Passerellidae | 20 | 2004 | +113% | 1972 | |
| House Sparrow | Passeridae | 20 | 2004 | +70% | 1972 | |
| Ash-throated Flycatcher | Tyrannidae | 17 | 2004 | +159% | 1972 | |
| Lazuli Bunting | Cardinalidae | 16 | 1995 | +120% | 1979 | |
| Mourning Dove | Columbidae | 15 | 2004 | +22% | 1972 | |
| Pinyon Jay | Corvidae | 15 | 1976 | +50% | 1974 | |
| California Thrasher | Mimidae | 11 | 2004 | +71% | 1972 | |
| Oak Titmouse | Paridae | 11 | 2004 | +129% | 1973 | |
| Spotted Towhee | Passerellidae | 10 | 2004 | +22% | 1972 | |
| Rock Pigeon | Columbidae | 10 | 2004 | +29% | 1979 | |
| Bewick's Wren | Troglodytidae | 8 | 2004 | +260% | 1976 | |
| American Crow | Corvidae | 8 | 2004 | +44% | 1975 | |
| Blue Grosbeak | Cardinalidae | 7 | 2004 | +200% | 1976 | |
| Red-tailed Hawk | Accipitridae | 7 | 2004 | +100% | 1974 | |
| Ruddy Duck | Anatidae | 7 | 1975 | +17% | 1973 | |
| Mountain Quail | Odontophoridae | 7 | 1991 | +60% | 1975 | |
| Mallard | Anatidae | 7 | 2004 | +600% | 1995 | |
| Cassin's Kingbird | Tyrannidae | 6 | 1981 | +500% | 1972 | |
| Lesser Goldfinch | Fringillidae | 6 | 2004 | +14% | 1974 | |
| Wilson's Warbler | Parulidae | 6 | 1981 | n/a | n/a | |
| Grasshopper Sparrow | Passerellidae | 6 | 1995 | n/a | n/a | |
| Red-winged Blackbird | Icteridae | 5 | 2004 | -10% | 1972 | |
| Western Meadowlark | Icteridae | 5 | 2004 | -58% | 1972 | |
| Bushtit | Aegithalidae | 5 | 2004 | -47% | 1974 | |
| Lawrence's Goldfinch | Fringillidae | 5 | 2004 | -11% | 1981 | |
| Lark Sparrow | Passerellidae | 4 | 2004 | -33% | 1976 | |
| Nuttall's Woodpecker | Picidae | 4 | 2004 | +75% | 1979 | |
| Phainopepla | Ptiliogonatidae | 4 | 2004 | +167% | 1975 | |
| Northern Mockingbird | Mimidae | 4 | 2004 | +100% | 1984 | |
| Wrentit | Sylviidae | 4 | 2004 | -22% | 1975 | |
| Great Horned Owl | Strigidae | 4 | 1974 | n/a | n/a | |
| Ladder-backed Woodpecker | Picidae | 4 | 2004 | +67% | 1979 | |
| Scott's Oriole | Icteridae | 4 | 1986 | -17% | 1981 | |
| Western Kingbird | Tyrannidae | 3 | 2004 | +67% | 1972 | |
| European Starling | Sturnidae | 3 | 2004 | +314% | 1972 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.