BirdAnalyst
Species · BCR 18 · BBS 2025 Release · 1966–2024

Marsh Wren In Shortgrass Prairie

All regionsShortgrass PrairieForest birds

Marsh Wren in Shortgrass Prairie has edged down: down 15% on the route-weighted index since 1994.

-15%Since 1994TrendPercent 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 RegionSurvey 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 SignalsNotable 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 Marsh Wren in Shortgrass Prairie. See the full index history below.

Routes In Shortgrass Prairie

Routes recording Marsh Wren in Shortgrass Prairie.
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 →
ArsenalCOLORADO52002
HudsonCOLORADO22015
Agate 2NEBRASKA22011
LingleWYOMING21995
DaltonNEBRASKA11974
Murray LakeNEBRASKA12018

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