BirdAnalyst
BBS Route · South Carolina · BCR 27

Holly Hill Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 102 species recorded across 42 survey years, still active.

102Species 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 →
42Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1972–2025Span
4Observers

Bird Species Found on South Carolina Holly Hill

Top 40 of 102 species by most recent count. Each links to its species trend.

Species recorded on the Holly Hill 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
Northern CardinalCardinalidae732025+1%1974
Carolina WrenTroglodytidae452025+90%1974
American CrowCorvidae372025-7%1974
Mourning DoveColumbidae362025-25%1974
Northern MockingbirdMimidae352025-16%1974
Barn SwallowHirundinidae33202511×1986
Purple MartinHirundinidae262025+161%1976
Turkey VultureCathartidae252025+950%1975
Blue JayCorvidae242025-59%1974
Blue GrosbeakCardinalidae212025+12%1974
Indigo BuntingCardinalidae212025-24%1974
Tufted TitmouseParidae192025+76%1974
Red-bellied WoodpeckerPicidae182025+18%1974
Common GrackleIcteridae182025-82%1974
Brown-headed CowbirdIcteridae172025+336%1974
European StarlingSturnidae162025-61%1974
Pine WarblerParulidae142025+130%1976
Great Crested FlycatcherTyrannidae132025+100%1974
White-eyed VireoVireonidae122025+129%1974
Eastern BluebirdTurdidae122025+620%1986
Orchard OrioleIcteridae112025+313%1974
Red-winged BlackbirdIcteridae102025-80%1974
Painted BuntingCardinalidae102025+57%1974
Yellow-breasted ChatIcteriidae102025+94%1975
Carolina ChickadeeParidae102025+105%1974
Blue-gray GnatcatcherPolioptilidae102025+318%1974
Summer TanagerCardinalidae102025+82%1975
Chimney SwiftApodidae72025-23%1974
Northern ParulaParulidae72025-47%1974
Eastern KingbirdTyrannidae62025-39%1974
Eastern TowheePasserellidae62025-71%1974
Loggerhead ShrikeLaniidae62025+88%1975
Black VultureCathartidae52022+700%1974
Red-eyed VireoVireonidae52025+0%1974
Brown ThrasherMimidae52025-11%1974
Northern BobwhiteOdontophoridae42025-93%1974
Pileated WoodpeckerPicidae42025-14%1974
House FinchFringillidae42025+217%2003
Canada GooseAnatidae42016n/an/a
Black-bellied Whistling-DuckAnatidae42025n/an/a

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