BirdAnalyst
BBS Route · Nevada · BCR 9

Willis Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 91 species recorded across 22 survey years, still active.

91Species 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 →
22Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1988–2025Span
3Observers

Bird Species Found on Nevada Willis

Top 40 of 91 species by most recent count. Each links to its species trend.

Species recorded on the Willis 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
Sagebrush SparrowPasserellidae362024-32%1995
Pinyon JayCorvidae282025-81%1995
American RobinTurdidae232025+51%1995
Brewer's BlackbirdIcteridae212025+0%1995
Horned LarkAlaudidae202025+127%1995
Brown-headed CowbirdIcteridae192025+48%1995
Mourning DoveColumbidae152025-45%1995
Brewer's SparrowPasserellidae132024-28%1995
Black-throated SparrowPasserellidae132025-63%1995
Turkey VultureCathartidae122025+550%2012
Western MeadowlarkIcteridae102024-57%1995
ChukarPhasianidae102025+150%2007
Spotted TowheePasserellidae92025-31%1995
Mountain ChickadeeParidae92025+140%1995
Yellow WarblerParulidae82024+36%1995
PhainopeplaPtiliogonatidae72025n/an/a
Common RavenCorvidae62025-46%1995
Bullock's OrioleIcteridae62025+150%1995
Ash-throated FlycatcherTyrannidae62025-10%1997
Black-headed GrosbeakCardinalidae52025-40%1995
Sage ThrasherMimidae52024-74%1995
California QuailOdontophoridae51995+400%1994
Green-tailed TowheePasserellidae52024+133%1996
Gambel's QuailOdontophoridae52003+50%2000
BushtitAegithalidae52025+133%1998
Western KingbirdTyrannidae42025-20%1995
Western Wood-PeweeTyrannidae42021+75%1995
Yellow-breasted ChatIcteriidae42025-71%1995
House FinchFringillidae32019-36%1996
Chipping SparrowPasserellidae32024-17%1995
Northern MockingbirdMimidae32025-41%1995
Woodhouse's Scrub-JayCorvidae32025-58%1996
European StarlingSturnidae32019+9%1996
Blue-gray GnatcatcherPolioptilidae32025+67%1997
Black-throated Gray WarblerParulidae32024-33%1999
Great-tailed GrackleIcteridae32024n/an/a
Broad-tailed HummingbirdTrochilidae22025-58%1995
Lesser GoldfinchFringillidae22025+267%1995
Song SparrowPasserellidae22024-69%1995
Loggerhead ShrikeLaniidae22021+14%1996

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