BirdAnalyst
Species · Maine · BBS 2025 Release · 1966–2024

Merlin Population Trend in Maine

All statesGeneralists

Merlin in Maine has increased: up 50% on the route-weighted index since 1996.

+50%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 →
18Routes 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 →
Medway220152015
Harmony219911991
Weeks Brook220151996
Cooper220162010
Northfield 2120162012
Greenville120062006
Wilson Mills120152015
Bethel120192019
Benedicta120082008
Hartford120162016
Clayton Lake119991996
Stacyville120232023
Cornville120192019
Ft Fairfield119981994
St David120042004
Priestly Br.119981998
Moose River120012001
Carrying Pl120212021

Merlin Population Trend in Other States

alaskaidahomassachusettsmichiganminnesotamontananebraskanew-hampshirenew-yorknorth-dakotaoregonpennsylvaniasouth-dakotavermontvirginiawashingtonwest-virginiawisconsinwyoming

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