BirdAnalyst
BBS Route · Colorado · BCR 16

Ludlow Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 104 species recorded across 12 survey years, still active.

104Species 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 →
12Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1998–2016Span
3Observers

Bird Species Found on Colorado Ludlow

Top 40 of 104 species by most recent count. Each links to its species trend.

Species recorded on the Ludlow 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
Cliff SwallowHirundinidae1072016+44%2001
Red-winged BlackbirdIcteridae552016+665%2001
American RobinTurdidae522016-6%2001
Western Wood-PeweeTyrannidae472016+46%2001
Spotted TowheePasserellidae382016-33%2001
Plumbeous VireoVireonidae212016+115%2001
Mourning DoveColumbidae202016-23%2001
Chipping SparrowPasserellidae202016+0%2001
Mountain BluebirdTurdidae192016+28%2001
Brewer's BlackbirdIcteridae192016+132%2003
Lesser GoldfinchFringillidae172016+8%2001
Wild TurkeyPhasianidae172016+320%2008
Rock WrenTroglodytidae162016+16%2001
Woodhouse's Scrub-JayCorvidae132016+107%2001
Barn SwallowHirundinidae122016+52%2001
Western KingbirdTyrannidae102016-4%2001
Cassin's KingbirdTyrannidae102016+222%2006
Northern MockingbirdMimidae102016+190%2001
Ash-throated FlycatcherTyrannidae102016+53%2003
BushtitAegithalidae102009+11%2006
Broad-tailed HummingbirdTrochilidae92016-25%2001
Virginia's WarblerParulidae92016-18%2001
Yellow WarblerParulidae82016+475%2001
House SparrowPasseridae82014+700%2001
Red-tailed HawkAccipitridae72016+9%2001
Black-billed MagpieCorvidae72016-38%2001
Pinyon JayCorvidae72016-19%2002
Black-headed GrosbeakCardinalidae72016+92%2001
Northern House WrenTroglodytidae72016-51%2001
Pine SiskinFringillidae72008+17%1999
Eurasian Collared-DoveColumbidae72016+150%2011
Say's PhoebeTyrannidae62016+156%2002
Brown-headed CowbirdIcteridae62016-57%2001
Lark SparrowPasserellidae62016+557%2001
Blue-gray GnatcatcherPolioptilidae62016+41%2008
American CootRallidae62014n/an/a
Common RavenCorvidae52016+11%2001
Warbling VireoVireonidae52016+40%2002
Western BluebirdTurdidae52016+60%2001
Cassin's SparrowPasserellidae52011n/an/a

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