BirdAnalyst
BBS Route · California · BCR 32

Glen Ellen 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 85 species recorded across 17 survey years, no longer active.

85Species RecordedSpecies recordedDistinct species detected on standard-protocol BBS runs here across all years on record — a measure of survey breadth, not a complete checklist.Full methodology →
17Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2005–2023Span
1Observers

Bird Species Found on California Glen Ellen 2

Top 40 of 85 species by most recent count. Each links to its species trend.

Species recorded on the Glen Ellen 2 route.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →History
California QuailOdontophoridae162023+20%2007
House FinchFringillidae162023+49%2007
European StarlingSturnidae132023+52%2008
Tree SwallowHirundinidae102023+108%2011
Spotted TowheePasserellidae92023-32%2007
Cliff SwallowHirundinidae82023-66%2007
American CrowCorvidae72023+4%2007
California TowheePasserellidae72023-31%2007
Black-headed GrosbeakCardinalidae62023-31%2007
Violet-green SwallowHirundinidae62023-71%2007
Cassin's VireoVireonidae62023+6%2007
Bewick's WrenTroglodytidae62023-45%2007
Wild TurkeyPhasianidae52022-11%2007
Northern MockingbirdMimidae52022-10%2009
BushtitAegithalidae52022+17%2007
Canada GooseAnatidae42021-62%2009
Mourning DoveColumbidae32023-32%2007
Downy WoodpeckerPicidae32022-13%2008
Acorn WoodpeckerPicidae32023+186%2007
Brown CreeperCerthiidae32015-30%2009
White-breasted NuthatchSittidae32022+60%2009
MallardAnatidae32018+67%2007
Nuttall's WoodpeckerPicidae22023+29%2008
Anna's HummingbirdTrochilidae22022+100%2008
Allen's HummingbirdTrochilidae22013+0%2008
Western KingbirdTyrannidae22012+0%2005
Ash-throated FlycatcherTyrannidae22023-22%2008
Black PhoebeTyrannidae22023-33%2007
Western Wood-PeweeTyrannidae22021-17%2014
California Scrub-JayCorvidae22023-18%2007
Common RavenCorvidae22023+19%2007
Red-winged BlackbirdIcteridae22018-50%2009
Brewer's BlackbirdIcteridae22022-58%2007
Lesser GoldfinchFringillidae22023+40%2008
Western TanagerCardinalidae22022-74%2007
Hermit WarblerParulidae22018+33%2007
Northern House WrenTroglodytidae22021+200%2009
Pygmy NuthatchSittidae22015-50%2006
Oak TitmouseParidae22023+11%2007
WrentitSylviidae22023-63%2007

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