BirdAnalyst
Species · New Hampshire · BBS 2026 Release · 1966–2025

Merlin Population Trend in New Hampshire

All statesBirds of prey

Merlin in New Hampshire has declined: down 34% on the route-weighted index since 2009.

-34%Since 2009TrendPercent 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 →
6Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
12YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Merlin Trends in New HampshireNotable 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 Merlin in New Hampshire. See the full index history below.

Merlin Survey Routes in New Hampshire

Routes recording Merlin in New Hampshire.
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 →
Lempster220162016
Fitzwilliam120152015
Walpole120232023
Jefferson Hl120212016
Franconia120092009
Milan120252005

Merlin Population Trend in Other States

alaskaidahomainemassachusettsmichiganminnesotamontananebraskanew-yorknorth-dakotaohiooregonpennsylvaniasouth-dakotavermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.