BirdAnalyst
BBS Route · New Hampshire · BCR 14

Glen Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 120 species recorded across 46 survey years, still active.

120Species 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 →
46Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1975–2025Span
4Observers

Bird Species Found on New Hampshire Glen

Top 40 of 120 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 VireoVireonidae922025+111%1977
American RobinTurdidae392025+26%1977
OvenbirdParulidae282025-4%1977
Black-capped ChickadeeParidae282025+93%1977
Chipping SparrowPasserellidae262025+183%1977
American CrowCorvidae222025-6%1977
Chestnut-sided WarblerParulidae212025+118%1977
Song SparrowPasserellidae192025+24%1977
Rock PigeonColumbidae182024+67%1979
American GoldfinchFringillidae172025+17%1977
Pine WarblerParulidae152025+483%1978
Barn SwallowHirundinidae142025-40%1977
Tufted TitmouseParidae142025+667%2000
Eastern PhoebeTyrannidae132025+18%1977
Indigo BuntingCardinalidae132025+486%1977
Blue JayCorvidae122025-35%1977
Tree SwallowHirundinidae102025-62%1977
Common YellowthroatParulidae102025-11%1977
American RedstartParulidae102025-53%1977
House SparrowPasseridae102025+218%1983
Northern CardinalCardinalidae102025+500%1983
Scarlet TanagerCardinalidae82025+33%1977
Northern House WrenTroglodytidae82025+200%1977
Northern Rough-winged SwallowHirundinidae82010+800%1985
Red-winged BlackbirdIcteridae72025-31%1977
Gray CatbirdMimidae72025+13%1977
Downy WoodpeckerPicidae62025+133%1977
Chimney SwiftApodidae62025-56%1977
Great Crested FlycatcherTyrannidae62025+0%1977
Black-and-white WarblerParulidae62025+88%1977
Blackburnian WarblerParulidae62025+64%1977
Hermit ThrushTurdidae62025+58%1977
Common RavenCorvidae62025+100%1978
Mourning DoveColumbidae52025-69%1977
Winter WrenTroglodytidae52024-44%1977
VeeryTurdidae52025-76%1977
Bank SwallowHirundinidae42007+9%1984
Black-throated Blue WarblerParulidae42025+29%1977
Eastern BluebirdTurdidae42025+60%1982
Hairy WoodpeckerPicidae32025+125%1978

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