BirdAnalyst
BBS Route · California · BCR 32

Athlone Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 84 species recorded across 16 survey years, still active.

84Species 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 →
16Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1972–2007Span
8Observers

Bird Species Found on California Athlone

Top 40 of 84 species by most recent count. Each links to its species trend.

Species recorded on the Athlone 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
Red-winged BlackbirdIcteridae3562007+194%1975
Cliff SwallowHirundinidae2952007+479%1974
European StarlingSturnidae281200714×1974
Western KingbirdTyrannidae1302007+219%1974
Brewer's BlackbirdIcteridae982007+59%1974
Mourning DoveColumbidae762007+22%1974
House SparrowPasseridae682007+359%1975
House FinchFringillidae502007+129%1974
Western MeadowlarkIcteridae442007-42%1974
Tricolored BlackbirdIcteridae412007-65%1978
Red-tailed HawkAccipitridae33200711×1974
American RobinTurdidae302007+315%1974
Horned LarkAlaudidae292007-40%1974
MallardAnatidae252007+625%1974
KilldeerCharadriidae252007-1%1974
Swainson's HawkAccipitridae242007+175%2003
Ring-necked PheasantPhasianidae231989-34%1974
Long-billed CurlewScolopacidae221972n/an/a
American CrowCorvidae22200723×1979
Yellow-billed MagpieCorvidae212004+271%1975
Bullock's OrioleIcteridae162007+750%1978
Brown-headed CowbirdIcteridae162007+59%1977
Northern MockingbirdMimidae152007+323%1974
Rock PigeonColumbidae122007+17%1975
Northern Rough-winged SwallowHirundinidae112007-82%1981
Violet-green SwallowHirundinidae111980-80%1979
American CootRallidae101989+900%1982
Turkey VultureCathartidae72007-15%1976
Great EgretArdeidae72007+40%2003
Northern HarrierAccipitridae62007+533%1976
Northern PintailAnatidae61979n/an/a
Barn SwallowHirundinidae52007+256%1975
Common YellowthroatParulidae51979+400%1975
Chipping SparrowPasserellidae51977-84%1976
Great-tailed GrackleIcteridae52007+400%2003
American KestrelFalconidae42007-4%1974
California Scrub-JayCorvidae42007+36%1981
California QuailOdontophoridae41989+100%1975
Western TanagerCardinalidae41976+300%1975
Common RavenCorvidae42004-33%1980

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