BirdAnalyst
BBS Route · Wisconsin · BCR 23

Colby Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 108 species recorded across 24 survey years, still active.

108Species 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 →
24Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1998–2025Span
4Observers

Bird Species Found on Wisconsin Colby

Top 40 of 108 species by most recent count. Each links to its species trend.

Species recorded on the Colby 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
Red-winged BlackbirdIcteridae672025-61%2000
American RobinTurdidae372025-54%2000
Savannah SparrowPasserellidae172025-76%2000
Song SparrowPasserellidae152025-66%2000
House SparrowPasseridae152025-68%2000
Yellow WarblerParulidae132025-30%2000
Mourning DoveColumbidae102025-29%2000
Common GrackleIcteridae102025-80%2000
Common YellowthroatParulidae92025-29%2000
KilldeerCharadriidae82025+44%2000
Rock PigeonColumbidae82025-73%2000
American CrowCorvidae82025-76%2000
Barn SwallowHirundinidae82024-44%2000
European StarlingSturnidae72025-90%2000
Brown-headed CowbirdIcteridae72025-58%2000
American GoldfinchFringillidae72025+20%2000
Chipping SparrowPasserellidae72025-33%2000
Northern House WrenTroglodytidae72025-18%2000
Canada GooseAnatidae62014-78%2002
Horned LarkAlaudidae62025-6%2000
BobolinkIcteridae62025-31%2000
Baltimore OrioleIcteridae62025-24%2000
Double-crested CormorantPhalacrocoracidae62003n/an/a
Gray CatbirdMimidae52025-43%2000
Eastern KingbirdTyrannidae42025+44%2000
Eastern MeadowlarkIcteridae42025-78%2000
Bank SwallowHirundinidae42022-34%2003
Indigo BuntingCardinalidae32025+367%2000
Cliff SwallowHirundinidae32025-32%2000
Tree SwallowHirundinidae32025-13%2000
Red-eyed VireoVireonidae32025-67%2000
White-breasted NuthatchSittidae32017+100%2002
Wild TurkeyPhasianidae32023-54%2004
Downy WoodpeckerPicidae32023+100%2013
DickcisselCardinalidae32025+155%2012
American RedstartParulidae32025+20%2012
Great Crested FlycatcherTyrannidae22025-50%2000
Brewer's BlackbirdIcteridae22017-63%2000
House FinchFringillidae22025+67%2001
Clay-colored SparrowPasserellidae22018+0%2000

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