BirdAnalyst
BBS Route · California · BCR 15

Eagle Lake Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 131 species recorded across 45 survey years, still active.

131Species 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 →
45Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1969–2024Span
7Observers

Bird Species Found on California Eagle Lake

Top 40 of 131 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
Western TanagerCardinalidae632024+123%1971
Western Wood-PeweeTyrannidae552024+122%1971
American RobinTurdidae512024+6%1971
Spotted TowheePasserellidae292024+600%1975
Chipping SparrowPasserellidae282024+35%1971
Mountain ChickadeeParidae272024+147%1971
Steller's JayCorvidae232024+67%1971
Rock WrenTroglodytidae232024+800%1971
Green-tailed TowheePasserellidae202024+150%1971
Common NighthawkCaprimulgidae202024+483%1972
Mourning DoveColumbidae182024+174%1971
Olive-sided FlycatcherTyrannidae172024-32%1971
Black-headed GrosbeakCardinalidae172024+678%1973
Brown CreeperCerthiidae132024+236%1972
Canada GooseAnatidae132023+275%1986
Western GrebePodicipedidae132024+17%1988
Western MeadowlarkIcteridae122024+170%1971
Brown-headed CowbirdIcteridae112024+171%1971
Brewer's SparrowPasserellidae112024+0%1971
Dusky FlycatcherTyrannidae102024+42%1971
Cassin's VireoVireonidae92024+200%1974
Nashville WarblerParulidae9202217×1995
Horned LarkAlaudidae82024-13%1971
Double-crested CormorantPhalacrocoracidae8200714×2003
Warbling VireoVireonidae72024+71%1972
White-breasted NuthatchSittidae72024+118%1973
Hammond's FlycatcherTyrannidae72022-29%1979
Song SparrowPasserellidae71975n/an/a
Evening GrosbeakFringillidae62017+180%1993
Lazuli BuntingCardinalidae62024-24%2021
MacGillivray's WarblerParulidae62024+100%2014
Red-breasted NuthatchSittidae52024+236%1971
Wilson's PhalaropeScolopacidae52007+25%1975
Common RavenCorvidae52024+111%1996
Hairy WoodpeckerPicidae42024+20%1972
Mountain BluebirdTurdidae42024-29%1971
Juniper TitmouseParidae41975n/an/a
Gray FlycatcherTyrannidae42024+22%1981
Black-throated SparrowPasserellidae42021n/an/a
Common MerganserAnatidae32023+233%1973

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