BirdAnalyst
Species · Maine · BBS 2026 Release · 1966–2025

Merlin Population Trend in Maine

All statesBirds of prey

Merlin in Maine has surged: up 76% on the route-weighted index since 1996.

+76%Since 1996TrendPercent 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 →
19Routes 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 →
17YearsYears 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 MaineNotable 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 Maine. See the full index history below.

Merlin Survey Routes in Maine

Routes recording Merlin in Maine.
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 →
Harmony219911991
Cooper220162010
Medway220152015
Weeks Brook220151996
Northfield 2120162012
Wilson Mills120152015
Bethel120192019
Hartford120162016
Hermon120212021
Moose River120012001
Carrying Pl120212021
Greenville120062006
Benedicta120082008
Clayton Lake119991996
Stacyville120232023
Cornville120192019
Ft Fairfield119981994
St David120042004
Priestly Br.119981998

Merlin Population Trend in Other States

alaskaidahomassachusettsmichiganminnesotamontananebraskanew-hampshirenew-yorknorth-dakotaohiooregonpennsylvaniasouth-dakotavermontvirginiawashingtonwest-virginiawisconsinwyoming

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