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

Black-crowned Night Heron In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieWetland birds

Black-crowned Night Heron in Eastern Tallgrass Prairie has fallen sharply: down 60% on the route-weighted index since 1968.

-60%Since 1968
35Routes In Region
51Years

Notable Signals

No notable trend signals for Black-crowned Night Heron in Eastern Tallgrass Prairie. See the full index history below.

Forecast

If the recent trend holds, Black-crowned Night Heron in Eastern Tallgrass Prairie is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±331%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.01Projected 2029 index
0.00–0.0995% range
±331%Backtest error
19662029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.020.000.09
20260.020.000.09
20270.020.000.09
20280.010.000.09
20290.010.000.09

Routes In Eastern Tallgrass Prairie

Routes recording Black-crowned Night Heron in Eastern Tallgrass Prairie.
BartonvilleILLINOIS71999
GaryINDIANA61999
JamestownILLINOIS51995
Bluff SpgsILLINOIS41974
New LenoxILLINOIS21988
ColumbiaILLINOIS22000
PortageINDIANA22001
Crown PointINDIANA22000
GalesburgKANSAS21985
WashingtonMISSOURI21968
BarringtonILLINOIS11995
ItascaILLINOIS12024
GeneseoILLINOIS11994
SheffieldILLINOIS11992
WayneILLINOIS12010
SherburnvillILLINOIS12015
Deer CreekILLINOIS11995
AthensvilleILLINOIS11988
BelleviewILLINOIS11982
Mascoutah LkILLINOIS12005
St MorganILLINOIS12008
YorkvilleILLINOIS12016
Cedar ValleyIOWA11985
PrairieburgIOWA12015
Sioux CityIOWA11990

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