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Species · BCR 14 · BBS 2025 Release · 1966–2024

Common Nighthawk In Atlantic Northern Forest

All regionsAtlantic Northern ForestAerial insectivores

Common Nighthawk in Atlantic Northern Forest has declined: down 45% on the route-weighted index since 1969.

-45%Since 1969TrendPercent 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 →
45Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
39YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Common Nighthawk in Atlantic Northern Forest. See the full index history below.

Common Nighthawk In Atlantic Northern Forest Population Forecast

If the recent trend holds, Common Nighthawk in Atlantic Northern Forest is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.10). A 5-year backtest shows a typical error of ±121.5%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029TrendPercent 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 →
0.00Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.1095% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±121.5%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Common Nighthawk in Atlantic Northern Forest is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.10). A 5-year backtest shows a typical error of ±121.5%, with 100% of held-out values landing inside the 95% band.19662029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20250.010.000.10
20260.010.000.10
20270.010.000.10
20280.010.000.10
20290.000.000.10

Routes In Atlantic Northern Forest

Routes recording Common Nighthawk in Atlantic Northern Forest.
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 →
TopsfieldMAINE61992
DebloisMAINE41973
HartfordMAINE31981
Grnd Lk StrmMAINE31992
HudsonMAINE21978
Horse MtnMAINE21985
SearsportMAINE22022
FitzwilliamNEW-HAMPSHIRE21982
ConcordNEW-HAMPSHIRE21982
WilmotNEW-HAMPSHIRE22012
BiddefordMAINE11994
NewcastleMAINE11975
BethelMAINE12003
GreenwoodMAINE11972
Bowdoin CtrMAINE11975
ManchesterMAINE11981
HarmonyMAINE12022
EastbrookMAINE12023
HancockMAINE11999
AuroraMAINE11982
CooperMAINE12019
NorthfieldMAINE11980
CharlestonMAINE12019
GreenvilleMAINE11972
WinnMAINE11979

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.