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BBS Route · California · BCR 15

Eagle Lake Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 133 species recorded across 46 survey years, still active.

133Species 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 →
46Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1969–2025Span
7Observers

Bird Species Found on California Eagle Lake

Top 40 of 133 species by most recent count. Each links to its species trend.

Species recorded on the Eagle Lake 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
Mourning DoveColumbidae612025+395%1971
Western TanagerCardinalidae432025+105%1971
Red CrossbillFringillidae402025+259%1972
Western Wood-PeweeTyrannidae352025+81%1971
Mountain ChickadeeParidae342025+113%1971
American RobinTurdidae302025-9%1971
Spotted TowheePasserellidae252025+622%1975
Green-tailed TowheePasserellidae242025+169%1971
Black-headed GrosbeakCardinalidae232025+678%1973
Chipping SparrowPasserellidae222025+52%1971
Gray FlycatcherTyrannidae192025+189%1981
Steller's JayCorvidae172025+40%1971
Western MeadowlarkIcteridae162025+320%1971
Rock WrenTroglodytidae162025+920%1971
Cassin's FinchFringillidae132025+64%1971
Canada GooseAnatidae132023+275%1986
Mountain BluebirdTurdidae122025+43%1971
White-breasted NuthatchSittidae122025+136%1973
Olive-sided FlycatcherTyrannidae102025-26%1971
Red-breasted NuthatchSittidae102025+209%1971
Western GrebePodicipedidae102025+21%1988
Brown-headed CowbirdIcteridae92025+179%1971
Band-tailed PigeonColumbidae92025-8%2013
Horned LarkAlaudidae82024-13%1971
Double-crested CormorantPhalacrocoracidae8200714×2003
Hammond's FlycatcherTyrannidae72022-29%1979
Cassin's VireoVireonidae72025+214%1974
Song SparrowPasserellidae71975n/an/a
Lazuli BuntingCardinalidae72025-18%2022
Eurasian Collared-DoveColumbidae72025+250%2014
Lark SparrowPasserellidae62025+200%1979
Evening GrosbeakFringillidae62017+180%1993
Warbling VireoVireonidae52025+100%1972
Common NighthawkCaprimulgidae52025+350%1972
Vesper SparrowPasserellidae52025+75%1973
Clark's NutcrackerCorvidae52025-50%1973
Wilson's PhalaropeScolopacidae52007+25%1975
Tree SwallowHirundinidae42025+0%1972
Juniper TitmouseParidae41975n/an/a
Common RavenCorvidae42025+56%1996

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.