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

Winter Wren Population Trend in Maryland

All statesForest birds

Winter Wren in Maryland has increased: up 48% on the route-weighted index since 1993.

+48%Since 1993TrendPercent 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 →
14YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Winter Wren Trends in MarylandNotable 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 Winter Wren in Maryland. See the full index history below.

Winter Wren Survey Routes in Maryland

Routes recording Winter Wren in Maryland.
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 →
Floyd120191972
Vindex120192019
Oldtown120182018
Jennings120172017
Steyer120081998
Finzel120152015

Winter Wren Population Trend in Other States

connecticutmainemassachusettsmichiganminnesotanew-hampshirenew-jerseynew-yorknorth-carolinaohiopennsylvaniatennesseevermontvirginiawest-virginiawisconsin

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