BirdAnalyst
Species · BCR 37 · BBS 2025 Release · 1966–2024

Acadian Flycatcher In Gulf Coastal Prairie

All regionsGulf Coastal PrairieAerial insectivores

Acadian Flycatcher in Gulf Coastal Prairie has edged down: down 23% on the route-weighted index since 1982.

-23%Since 1982TrendPercent 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 →
13Routes 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 →
23YearsYears 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 Acadian Flycatcher in Gulf Coastal Prairie. See the full index history below.

Forecast

If the recent trend holds, Acadian Flycatcher in Gulf Coastal Prairie is projected to stay roughly flat through 2028, near 0.08 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±167.7%, with 100% of held-out values landing inside the 95% band.

-5%Change by 2028TrendPercent 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 →
0.08Projected 2028 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.1795% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±167.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Acadian Flycatcher in Gulf Coastal Prairie is projected to stay roughly flat through 2028, near 0.08 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±167.7%, with 100% of held-out values landing inside the 95% band.19712028
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20240.080.000.17
20250.080.000.17
20260.080.000.17
20270.080.000.17
20280.080.000.17

Routes In Gulf Coastal Prairie

Routes recording Acadian Flycatcher in Gulf Coastal 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 →
Ltl ChenierLOUISIANA21994
VintonLOUISIANA22009
Hinkles FerTEXAS22009
LafitteLOUISIANA11989
HackberryLOUISIANA11997
GlencoeLOUISIANA12013
EstherLOUISIANA12010
Ville PlatteLOUISIANA12001
Vinton 2LOUISIANA12016
WinnieTEXAS11993
StowellTEXAS11971
KatyTEXAS12023
Port AcresTEXAS12023

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