BirdAnalyst
BBS Route · Colorado · BCR 16

Rio Grnds Rs Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 106 species recorded across 28 survey years, still active.

106Species 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 →
28Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1991–2024Span
3Observers

Bird Species Found on Colorado Rio Grnds Rs

Top 40 of 106 species by most recent count. Each links to its species trend.

Species recorded on the Rio Grnds Rs 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
Canada GooseAnatidae1192024+186%1994
Lesser ScaupAnatidae782024+61%1993
GadwallAnatidae482024+470%1994
MallardAnatidae382024+49%1993
Northern ShovelerAnatidae202009+110%2002
American CootRallidae162024+114%1993
Tree SwallowHirundinidae162024-7%1999
Ruddy DuckAnatidae152024+131%1993
Western MeadowlarkIcteridae152024+10%1993
Brewer's BlackbirdIcteridae152024-49%1993
American RobinTurdidae152024-63%1993
Black SwiftApodidae152017+88%2010
Cliff SwallowHirundinidae132024-88%1993
Black-crowned Night HeronArdeidae121999+40%1994
Common RavenCorvidae112024+246%1993
Red-winged BlackbirdIcteridae102024-65%1993
Song SparrowPasserellidae92024+33%1994
Warbling VireoVireonidae92024+25%1994
Broad-tailed HummingbirdTrochilidae82024-40%1993
Black-billed MagpieCorvidae82024-62%1993
Violet-green SwallowHirundinidae82024-56%1993
Green-tailed TowheePasserellidae72024-56%1993
Western Wood-PeweeTyrannidae62000+100%1994
Yellow WarblerParulidae62024-8%1993
Eared GrebePodicipedidae62024+29%2000
RedheadAnatidae62012+100%2006
Lincoln's SparrowPasserellidae62024-9%2003
Common MerganserAnatidae52024+0%1993
Vesper SparrowPasserellidae52024-53%2000
Cinnamon TealAnatidae42009+0%1994
Ruby-crowned KingletRegulidae42024-28%1994
Yellow-headed BlackbirdIcteridae42003+200%1995
Spotted TowheePasserellidae32002-40%1992
Hermit ThrushTurdidae32015-73%1994
Barn SwallowHirundinidae32021-50%2002
Say's PhoebeTyrannidae31999+200%1995
Lark SparrowPasserellidae32015+33%2003
Green-winged TealAnatidae22021-89%1993
Great Blue HeronArdeidae22024+0%2000
Mourning DoveColumbidae22024+100%2002

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