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BBS Route · California · BCR 32

Greenfield Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 111 species recorded across 42 survey years, still active.

111Species Recorded
42Years Surveyed
1973–2024Span
7Observers

Bird Species Found on California Greenfield

Top 40 of 111 species by most recent count. Each links to its species trend.

Species recorded on the Greenfield route.
History
Brewer's BlackbirdIcteridae1162024-54%1975
House FinchFringillidae1162024+85%1975
Tricolored BlackbirdIcteridae1132024+324%2014
Cliff SwallowHirundinidae712024-52%1975
European StarlingSturnidae552024+185%1975
Rock PigeonColumbidae512024+58%1983
House SparrowPasseridae502024+105%1975
California QuailOdontophoridae472024+39%1975
WrentitSylviidae312024+233%1975
Western MeadowlarkIcteridae302024-65%1975
Eurasian Collared-DoveColumbidae302024+44%2014
Barn SwallowHirundinidae262024+536%1976
Mourning DoveColumbidae212024-51%1975
Common RavenCorvidae182024+886%1984
American CrowCorvidae182024+73%1975
California TowheePasserellidae162024+17%1975
Ash-throated FlycatcherTyrannidae152024+640%1975
Yellow-billed MagpieCorvidae152024-27%1975
California Scrub-JayCorvidae132024-5%1975
Bewick's WrenTroglodytidae132024-3%1976
Spotted TowheePasserellidae122024+26%1975
Song SparrowPasserellidae112024+29%1975
Oak TitmouseParidae112024+62%1978
Violet-green SwallowHirundinidae102024+0%1975
KilldeerCharadriidae92024+0%1975
Acorn WoodpeckerPicidae92024+238%1975
Lesser GoldfinchFringillidae92024-57%1975
Lawrence's GoldfinchFringillidae92024-21%1977
Rufous-crowned SparrowPasserellidae92024+800%1976
White-breasted NuthatchSittidae92024+150%1993
Red-tailed HawkAccipitridae82024+633%1976
Northern MockingbirdMimidae72024+58%1975
Red-winged BlackbirdIcteridae62024-18%1976
California ThrasherMimidae62024+111%1975
Western BluebirdTurdidae62024+25%1975
Horned LarkAlaudidae62024+54%1987
Northern Rough-winged SwallowHirundinidae52024-85%1975
American RobinTurdidae52024+71%1976
White-throated SwiftApodidae52024-52%1979
Northern House WrenTroglodytidae52024+250%1987

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.