BirdAnalyst
BBS Route · Virginia · BCR 28

Isom Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 104 species recorded across 45 survey years, still active.

104Species 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 →
45Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1969–2024Span
3Observers

Bird Species Found on Virginia Isom

Top 40 of 104 species by most recent count. Each links to its species trend.

Species recorded on the Isom 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 CrowCorvidae412024+72%1971
Red-eyed VireoVireonidae392024+2%1971
Northern CardinalCardinalidae292024-20%1971
American RobinTurdidae292024+25%1971
Song SparrowPasserellidae272024-32%1971
Carolina WrenTroglodytidae222024+28%1971
Northern ParulaParulidae212024+19%1971
Indigo BuntingCardinalidae202024-66%1971
OvenbirdParulidae192024-12%1971
Wood ThrushTurdidae182024-77%1971
Yellow-throated WarblerParulidae152024+460%1984
Tufted TitmouseParidae142024-21%1971
Blue JayCorvidae132024+17%1971
American GoldfinchFringillidae132024+12%1971
Hooded WarblerParulidae132024+8%1971
Eastern PhoebeTyrannidae112024+75%1971
Chipping SparrowPasserellidae112024-42%1971
Gray CatbirdMimidae112024-54%1971
Carolina ChickadeeParidae112024-29%1971
White-breasted NuthatchSittidae112024+700%1972
Red-bellied WoodpeckerPicidae102024+450%1987
Eastern TowheePasserellidae102024-71%1971
Mourning DoveColumbidae92024+414%1971
Scarlet TanagerCardinalidae92024+40%1971
Black-and-white WarblerParulidae82024-13%1971
Blue-gray GnatcatcherPolioptilidae82024+118%1971
Eastern Wood-PeweeTyrannidae72024-65%1971
Acadian FlycatcherTyrannidae62024-44%1971
Tree SwallowHirundinidae6202413×2010
Downy WoodpeckerPicidae52024-9%1971
Northern Rough-winged SwallowHirundinidae52024-38%1971
Brown-headed CowbirdIcteridae42024-9%1971
Yellow WarblerParulidae42024-74%1971
American RedstartParulidae42024-73%1971
Eastern BluebirdTurdidae42024+23%1971
Red-shouldered HawkAccipitridae42024+400%1979
Yellow-billed CuckooCuculidae32016-14%1971
Pileated WoodpeckerPicidae32024+250%1971
Common GrackleIcteridae32016+25%1972
Cerulean WarblerParulidae32010+67%1972

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