BirdAnalyst
BBS Route · Virginia · BCR 28

Nat Tunnel Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 100 species recorded across 39 survey years, still active.

100Species 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 →
39Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1981–2024Span
5Observers

Bird Species Found on Virginia Nat Tunnel

Top 40 of 100 species by most recent count. Each links to its species trend.

Species recorded on the Nat Tunnel 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 CrowCorvidae982024+51%1983
Northern CardinalCardinalidae662024+148%1983
American GoldfinchFringillidae512024+182%1983
Red-eyed VireoVireonidae392024+32%1983
Indigo BuntingCardinalidae322024-53%1983
Canada GooseAnatidae282000n/an/a
Tufted TitmouseParidae272024+85%1983
Mourning DoveColumbidae262024+152%1983
Field SparrowPasserellidae242024-49%1983
American RobinTurdidae242024+37%1983
Song SparrowPasserellidae222024-28%1983
Eastern TowheePasserellidae222024+6%1983
European StarlingSturnidae212024+135%1983
Carolina WrenTroglodytidae192024+91%1983
Wood ThrushTurdidae172024+27%1983
Northern MockingbirdMimidae152024+460%1984
Northern ParulaParulidae122024+25%1983
OvenbirdParulidae112024+100%1983
Carolina ChickadeeParidae102024+39%1983
Blue-gray GnatcatcherPolioptilidae102024-39%1983
Acadian FlycatcherTyrannidae82024+21%1984
Blue JayCorvidae82024-28%1983
Scarlet TanagerCardinalidae82024-53%1984
Barn SwallowHirundinidae82024-53%1983
Chipping SparrowPasserellidae72024-33%1983
Eastern BluebirdTurdidae72024+0%1983
Pileated WoodpeckerPicidae72024+22%1985
Eastern MeadowlarkIcteridae62024+31%1983
Eastern PhoebeTyrannidae52024+33%1983
Red-winged BlackbirdIcteridae52024-6%1983
Common GrackleIcteridae52024-35%1983
Hooded WarblerParulidae52024+133%1983
House FinchFringillidae52024+40%2002
Red-shouldered HawkAccipitridae42024+33%2009
Eastern KingbirdTyrannidae42024-46%1983
White-eyed VireoVireonidae42024-25%1983
Blue-winged WarblerParulidae42000+300%1981
Kentucky WarblerParulidae42024-67%1983
White-breasted NuthatchSittidae42024+43%1985
Chimney SwiftApodidae32024-61%1983

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