BirdAnalyst
BBS Route · Maryland · BCR 29

Wheaton Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 89 species recorded across 31 survey years, still active.

89Species 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 →
31Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1990–2025Span
5Observers

Bird Species Found on Maryland Wheaton

Top 40 of 89 species by most recent count. Each links to its species trend.

Species recorded on the Wheaton 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
American RobinTurdidae1342025+106%1992
Northern CardinalCardinalidae1122025+197%1992
House SparrowPasseridae1092025+49%1992
American CrowCorvidae572025+32%1992
Gray CatbirdMimidae552025+44%1992
Northern House WrenTroglodytidae472025+86%1992
Mourning DoveColumbidae452025+6%1992
Chipping SparrowPasserellidae442025+203%1992
Fish CrowCorvidae422025+464%1992
Song SparrowPasserellidae422025+52%1992
Carolina WrenTroglodytidae392025+167%1992
House FinchFringillidae382025-55%1992
Northern MockingbirdMimidae372025-9%1992
Blue JayCorvidae362025+208%1992
Common GrackleIcteridae352025+26%1992
Red-bellied WoodpeckerPicidae312025+259%1992
European StarlingSturnidae312025-46%1992
White-breasted NuthatchSittidae282025+408%1992
Great Crested FlycatcherTyrannidae262025+860%1993
Carolina ChickadeeParidae262025+36%1992
Cedar WaxwingBombycillidae232025+260%1993
Downy WoodpeckerPicidae202025+167%1992
American GoldfinchFringillidae182025+38%1992
Brown-headed CowbirdIcteridae162025-7%1992
Tufted TitmouseParidae162025+30%1992
Blue-gray GnatcatcherPolioptilidae152025+233%1992
Red-winged BlackbirdIcteridae142025-38%1992
Red-eyed VireoVireonidae122025+61%1992
Chimney SwiftApodidae102025+35%1992
Eastern BluebirdTurdidae102025+160%1993
Eastern Wood-PeweeTyrannidae92025+225%1992
Eastern TowheePasserellidae72025+138%1992
Rock PigeonColumbidae62025-20%1992
Pileated WoodpeckerPicidae62025+67%1993
Acadian FlycatcherTyrannidae52025-43%1992
Wood ThrushTurdidae52025-13%1992
Canada GooseAnatidae52025+107%1995
Grasshopper SparrowPasserellidae41995+0%1992
Indigo BuntingCardinalidae42025-43%1992
Barn SwallowHirundinidae42025-44%1992

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