BirdAnalyst
BBS Route · New Hampshire · BCR 14

Marlow Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 121 species recorded across 59 survey years, still active.

121Species 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 →
59Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2025Span
4Observers

Bird Species Found on New Hampshire Marlow

Top 40 of 121 species by most recent count. Each links to its species trend.

Species recorded on the Marlow 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 VireoVireonidae362025+19%1968
European StarlingSturnidae272025-73%1968
American RobinTurdidae272025+3%1968
Song SparrowPasserellidae232025-13%1968
OvenbirdParulidae232025+0%1968
American GoldfinchFringillidae222025-26%1968
Gray CatbirdMimidae222025+43%1968
Red-winged BlackbirdIcteridae212025-30%1968
Common YellowthroatParulidae212025-29%1968
Black-capped ChickadeeParidae202025+63%1968
Chipping SparrowPasserellidae192025+100%1968
Mourning DoveColumbidae182025+347%1974
American CrowCorvidae182025+146%1968
Tufted TitmouseParidae18202514×1987
Black-and-white WarblerParulidae132025+383%1968
VeeryTurdidae132025-46%1968
Common GrackleIcteridae122025+12%1968
Yellow-bellied SapsuckerPicidae112025+88%1969
Chestnut-sided WarblerParulidae112025-27%1968
Northern House WrenTroglodytidae112025+500%1968
Eastern PhoebeTyrannidae102025-15%1968
Tree SwallowHirundinidae102025-56%1968
Northern MockingbirdMimidae102007+250%1983
Northern CardinalCardinalidae92025+560%1980
Pine WarblerParulidae92025+767%1993
Blue JayCorvidae72025-22%1968
Yellow WarblerParulidae72025+31%1968
Purple FinchFringillidae52025+0%1968
Swamp SparrowPasserellidae52025-32%1968
Warbling VireoVireonidae52024-27%1968
Canada GooseAnatidae52025-85%1992
Red-bellied WoodpeckerPicidae52025+267%2016
Hairy WoodpeckerPicidae42024+300%1968
Alder FlycatcherTyrannidae42025+113%1968
Indigo BuntingCardinalidae42025+100%1969
Cedar WaxwingBombycillidae42025-19%1968
American RedstartParulidae42025-14%1968
House SparrowPasseridae42025-50%1968
Pileated WoodpeckerPicidae42025+400%1972
Eastern Wood-PeweeTyrannidae42025+31%1969

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