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

Merlin Population Trend in Washington

All statesBirds of prey

Merlin in Washington has edged down: down 21% on the route-weighted index since 1986.

-21%Since 1986TrendPercent 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 →
14Routes 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 WashingtonNotable 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 Washington. See the full index history below.

Merlin Survey Routes in Washington

Routes recording Merlin in Washington.
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 →
Reardan220242024
Ozette120072007
Port Angeles120082008
Twisp119981998
Keller119861986
Chewelah120171980
Mukilteo120241998
Ewan 2120252025
Ardenvoir119711971
Mt. Adams120102010
Nighthawk120242024
Yakima120182018
Kendall120082008
Glacier120042004

Merlin Population Trend in Other States

alaskaidahomainemassachusettsmichiganminnesotamontananebraskanew-hampshirenew-yorknorth-dakotaohiooregonpennsylvaniasouth-dakotavermontvirginiawest-virginiawisconsinwyoming

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