BirdAnalyst
Species · BCR 26 · BBS 2026 Release · 1966–2025

Swallow-tailed Kite In Mississippi Alluvial Valley

All regionsMississippi Alluvial ValleyBirds of prey

Swallow-tailed Kite in Mississippi Alluvial Valley has fallen sharply: down 52% on the route-weighted index since 1992.

-52%Since 1992TrendPercent 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 →
8Routes 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 →
34YearsYears 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 →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Swallow-tailed Kite has fallen sharply in Mississippi Alluvial Valley: down 52% on the route-weighted index since 1992.

Swallow-tailed Kite In Mississippi Alluvial Valley Population Forecast

If the recent trend holds, Swallow-tailed Kite in Mississippi Alluvial Valley is projected to stay roughly flat through 2030, near 0.16 (95% range 0.00–0.46). A 5-year backtest shows a typical error of ±387.6%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2030TrendPercent 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 →
0.16Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.4695% 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 →
±387.6%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, Swallow-tailed Kite in Mississippi Alluvial Valley is projected to stay roughly flat through 2030, near 0.16 (95% range 0.00–0.46). A 5-year backtest shows a typical error of ±387.6%, with 100% of held-out values landing inside the 95% band.19902030
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 →
20260.160.000.46
20270.160.000.46
20280.160.000.46
20290.160.000.46
20300.160.000.46

Routes In Mississippi Alluvial Valley

Routes recording Swallow-tailed Kite in Mississippi Alluvial Valley.
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 →
KraemerLOUISIANA32022
Port AllenLOUISIANA32019
RoselandLOUISIANA22010
RamahLOUISIANA22023
BerwickLOUISIANA12018
Morgan CityLOUISIANA12022
River RoadLOUISIANA12025
AtchafalayaLOUISIANA12018

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