BirdAnalyst
BBS Route · Nevada · BCR 9

Cortez Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 86 species recorded across 20 survey years, still active.

86Species 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 →
20Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2025Span
3Observers

Bird Species Found on Nevada Cortez

Top 40 of 86 species by most recent count. Each links to its species trend.

Species recorded on the Cortez 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
Horned LarkAlaudidae502025+780%1970
Canada GooseAnatidae422025+142%2019
Sagebrush SparrowPasserellidae372025+6%1970
MallardAnatidae34202514×1976
Western MeadowlarkIcteridae282025-51%1970
Common RavenCorvidae272025+700%1970
White-faced IbisThreskiornithidae242022+500%2018
Cinnamon TealAnatidae182025+667%1970
American CootRallidae18202514×1970
Yellow-headed BlackbirdIcteridae182025+800%1970
Mourning DoveColumbidae122025-38%1970
Eared GrebePodicipedidae12202531×1977
Black-throated SparrowPasserellidae102025+160%1974
Lark SparrowPasserellidae102025+250%1974
Brewer's BlackbirdIcteridae102025+567%1974
Black-necked StiltRecurvirostridae102025n/an/a
Violet-green SwallowHirundinidae81972+700%1968
RedheadAnatidae62025-24%1971
Pied-billed GrebePodicipedidae62025+167%2019
Brown-headed CowbirdIcteridae52023+125%1973
GadwallAnatidae42025+180%1971
Red-winged BlackbirdIcteridae42025-15%1970
Barn SwallowHirundinidae42025-9%1970
Sage ThrasherMimidae42025-58%1970
Ruddy DuckAnatidae42025+9%2018
Ring-billed GullLaridae42018n/an/a
Eurasian Collared-DoveColumbidae42025+13%2021
Ash-throated FlycatcherTyrannidae42023+100%2022
American KestrelFalconidae32024+100%1970
Common NighthawkCaprimulgidae32025+78%1971
Black-billed MagpieCorvidae32025-50%1970
Pinyon JayCorvidae32025+107%1970
Brewer's SparrowPasserellidae32025-35%1970
KilldeerCharadriidae32025+150%1973
ChukarPhasianidae31969n/an/a
Bullock's OrioleIcteridae32023+100%1972
House SparrowPasseridae32024+67%2018
Northern MockingbirdMimidae32024+75%1974
Red-tailed HawkAccipitridae32025-13%2017
Chipping SparrowPasserellidae32019+50%2018

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