BirdAnalyst
BBS Route · South Carolina · BCR 27

Dillon Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 92 species recorded across 37 survey years, still active.

92Species 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 →
37Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1970–2021Span
5Observers

Bird Species Found on South Carolina Dillon

Top 40 of 92 species by most recent count. Each links to its species trend.

Species recorded on the Dillon 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
Mourning DoveColumbidae732021+53%1972
Canada GooseAnatidae672021+407%2010
American CrowCorvidae642021+557%1972
Red-winged BlackbirdIcteridae602021+25%1972
Rock PigeonColumbidae592021+390%1977
Northern CardinalCardinalidae452021+47%1972
Carolina WrenTroglodytidae442021+684%1972
Northern MockingbirdMimidae372021-38%1972
Barn SwallowHirundinidae31202111×1993
Common GrackleIcteridae272021-84%1972
Tufted TitmouseParidae25202112×1974
Turkey VultureCathartidae23202114×2002
European StarlingSturnidae202021-66%1972
Purple MartinHirundinidae202021+263%1973
Carolina ChickadeeParidae202021+320%1974
Blue JayCorvidae152021-8%1972
Chimney SwiftApodidae132021+53%1972
Eastern BluebirdTurdidae132021+325%1979
Red-bellied WoodpeckerPicidae102021+20%1972
Great Crested FlycatcherTyrannidae102021+225%1973
Eastern TowheePasserellidae102021-46%1972
Yellow-billed CuckooCuculidae92021-17%1973
White-eyed VireoVireonidae92021+425%1973
Indigo BuntingCardinalidae82021+119%1972
Blue-gray GnatcatcherPolioptilidae82021+375%1975
Brown-headed CowbirdIcteridae82021+129%1976
Eastern KingbirdTyrannidae72021+15%1972
Orchard OrioleIcteridae72021+360%1972
Blue GrosbeakCardinalidae72021+35%1972
Yellow-breasted ChatIcteriidae72021+200%1978
Northern BobwhiteOdontophoridae62021-90%1972
Downy WoodpeckerPicidae62019+100%1973
Great Blue HeronArdeidae62021+150%1974
Chipping SparrowPasserellidae62021+77%1992
Wood StorkCiconiidae62017n/an/a
Chuck-will's-widowCaprimulgidae52014+125%1993
Pine WarblerParulidae52021+28%1992
Horned LarkAlaudidae52014+111%1995
Eastern Whip-poor-willCaprimulgidae42000+67%1995
American RobinTurdidae42021+264%1972

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