BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

Fish Crow In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieGeneralists

Fish Crow in Eastern Tallgrass Prairie has surged: up 24× on the route-weighted index since 1999.

24×Since 1999TrendPercent 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 →
36Routes 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 →
26YearsYears 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 increasecomputed 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 →

Fish Crow has surged in Eastern Tallgrass Prairie: up 24× on the route-weighted index since 1999.

Fish Crow In Eastern Tallgrass Prairie Population Forecast

If the recent trend holds, Fish Crow in Eastern Tallgrass Prairie is projected to rise about 13% by 2029 — from 0.21 in 2024 to a central estimate of 0.24 (95% range 0.15–0.33). A 5-year backtest shows a typical error of ±21.4%, with 100% of held-out values landing inside the 95% band.

+13%Change by 2029TrendPercent 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 →
0.24Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.15–0.3395% 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 →
±21.4%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, Fish Crow in Eastern Tallgrass Prairie is projected to rise about 13% by 2029 — from 0.21 in 2024 to a central estimate of 0.24 (95% range 0.15–0.33). A 5-year backtest shows a typical error of ±21.4%, with 100% of held-out values landing inside the 95% band.19942029
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 →
20250.210.120.30
20260.220.130.31
20270.230.130.32
20280.230.140.33
20290.240.150.33

Routes In Eastern Tallgrass Prairie

Routes recording Fish Crow in Eastern Tallgrass 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 →
PittsburgKANSAS102021
DudleyvilleILLINOIS82023
KeetonvilleOKLAHOMA72022
MelroseKANSAS62023
FilleyMISSOURI62024
Mascoutah LkILLINOIS52024
BelleviewILLINOIS32023
Mt VernonILLINOIS32024
PaysonILLINOIS32017
KellILLINOIS32024
HumboldtKANSAS32022
KingsvilleMISSOURI32024
MilfordMISSOURI32024
St MorganILLINOIS22022
BeaucoupILLINOIS22024
DarmstadtILLINOIS22024
WrefordKANSAS22024
MoreheadKANSAS22023
ReeceKANSAS22024
MoselleMISSOURI22024
GulfportILLINOIS12023
PawneeILLINOIS12023
ColumbiaILLINOIS12022
JamestownILLINOIS12019
OlneyILLINOIS12014

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