BirdAnalyst
BBS Route · Arizona · BCR 34

Williams Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 93 species recorded across 14 survey years, still active.

93Species 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 →
14Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1993–2025Span
8Observers

Bird Species Found on Arizona Williams

Top 40 of 93 species by most recent count. Each links to its species trend.

Species recorded on the Williams 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 DoveColumbidae462025+17%2001
Violet-green SwallowHirundinidae362025+252%2001
Western TanagerCardinalidae342025+69%2001
American RobinTurdidae302025-48%2001
Mountain ChickadeeParidae252025+55%2001
American CrowCorvidae232025-10%2006
Common RavenCorvidae222025+14%2001
Black-headed GrosbeakCardinalidae222025+88%2006
Western Wood-PeweeTyrannidae212025+10%2001
White-breasted NuthatchSittidae202025+96%2001
Steller's JayCorvidae152025-22%2001
Plumbeous VireoVireonidae152025+23%2001
Acorn WoodpeckerPicidae152025+42%2006
Ash-throated FlycatcherTyrannidae132025+217%2001
Gray FlycatcherTyrannidae132025+29%2007
Black-throated Gray WarblerParulidae132025-14%2009
Spotted TowheePasserellidae122025+67%2007
Pygmy NuthatchSittidae112025+138%2001
Northern House WrenTroglodytidae112025+100%2007
Western MeadowlarkIcteridae102025+167%2013
Chipping SparrowPasserellidae102025-49%2001
Northern MockingbirdMimidae102025+20%2006
Canada GooseAnatidae102025-9%2017
Cliff SwallowHirundinidae102025n/an/a
Hairy WoodpeckerPicidae92025+63%2006
Red-winged BlackbirdIcteridae92025+0%2006
House FinchFringillidae82025+118%2001
Lesser GoldfinchFringillidae82019-15%2009
Western BluebirdTurdidae62025-38%2001
Cassin's KingbirdTyrannidae62025+43%2007
Grace's WarblerParulidae62025-42%2007
Purple MartinHirundinidae62025+25%2013
European StarlingSturnidae52013-32%2001
Brown-headed CowbirdIcteridae52025-59%2006
Canyon TowheePasserellidae52001+400%1993
OspreyPandionidae42025+29%2006
Barn SwallowHirundinidae42025+50%2006
Turkey VultureCathartidae42025+0%2007
Yellow-headed BlackbirdIcteridae42001n/an/a
Wild TurkeyPhasianidae42011n/an/a

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