BirdAnalyst
BBS Route · New Hampshire · BCR 14

Glen Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 119 species recorded across 45 survey years, still active.

119Species 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 →
1975–2024Span
4Observers

Bird Species Found on New Hampshire Glen

Top 40 of 119 species by most recent count. Each links to its species trend.

Species recorded on the Glen 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
Red-eyed VireoVireonidae742024+99%1977
Chipping SparrowPasserellidae402024+200%1977
American RobinTurdidae392024+18%1977
Canada GooseAnatidae302022+417%1997
American CrowCorvidae282024-14%1977
Chestnut-sided WarblerParulidae242024+100%1977
OvenbirdParulidae242024-10%1977
Song SparrowPasserellidae192024+7%1977
Rock PigeonColumbidae182024+67%1979
Indigo BuntingCardinalidae172024+486%1977
American GoldfinchFringillidae162024+17%1977
House SparrowPasseridae162024+164%1983
Black-capped ChickadeeParidae152024+66%1977
Common YellowthroatParulidae142024-9%1977
Eastern PhoebeTyrannidae132024+21%1977
Barn SwallowHirundinidae92024-42%1977
Pine WarblerParulidae92024+417%1978
Northern House WrenTroglodytidae92024+213%1977
Red-winged BlackbirdIcteridae82024-35%1977
Tree SwallowHirundinidae82024-77%1977
Red-breasted NuthatchSittidae82024+300%1977
Hermit ThrushTurdidae82024+67%1977
Northern Rough-winged SwallowHirundinidae82010+800%1985
Scarlet TanagerCardinalidae72024+60%1977
Blackburnian WarblerParulidae72024+46%1977
Black-and-white WarblerParulidae62024+50%1977
Gray CatbirdMimidae62024-25%1977
Blue JayCorvidae52024-47%1977
Blue-headed VireoVireonidae52024-11%1978
Winter WrenTroglodytidae52024-44%1977
White-breasted NuthatchSittidae52023+71%1978
Common RavenCorvidae52024+75%1978
Northern CardinalCardinalidae52024+333%1983
Bank SwallowHirundinidae42007+9%1984
VeeryTurdidae42024-79%1977
Tufted TitmouseParidae42024+433%2000
Hairy WoodpeckerPicidae32024+75%1978
Chimney SwiftApodidae32024-74%1977
Least FlycatcherTyrannidae32024-56%1977
BobolinkIcteridae32023-67%1977

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