BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

American Bittern In Great Basin

All regionsGreat BasinWetland birds

American Bittern in Great Basin has edged down: down 23% on the route-weighted index since 1972.

-23%Since 1972
42Routes In Region
53Years

Notable Signals

No notable trend signals for American Bittern in Great Basin. See the full index history below.

Forecast

If the recent trend holds, American Bittern in Great Basin is projected to rise about 21% by 2029 — from 0.06 in 2024 to a central estimate of 0.07 (95% range 0.00–0.22). A 5-year backtest shows a typical error of ±98.4%, with 100% of held-out values landing inside the 95% band.

+21%Change by 2029
0.07Projected 2029 index
0.00–0.2295% range
±98.4%Backtest error
19702029
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
20250.070.000.23
20260.070.000.23
20270.070.000.23
20280.070.000.23
20290.070.000.22

Routes In Great Basin

Routes recording American Bittern in Great Basin.
Virgin CreekNEVADA52018
MerrillOREGON42013
Warner VallyOREGON41999
Honey LakeCALIFORNIA32024
DorrisCALIFORNIA32019
MacdoelCALIFORNIA32017
Turnbull NwrWASHINGTON32016
NubieberCALIFORNIA22007
Davis CreekCALIFORNIA21999
EurekaNEVADA22000
GardnervilleNEVADA22006
BlyOREGON22001
PromontoryUTAH22006
CallaoUTAH22024
Moses LakeWASHINGTON22004
PotholesWASHINGTON22019
LikelyCALIFORNIA12024
Crowley LakeCALIFORNIA11972
CedarvilleCALIFORNIA12017
TionestaCALIFORNIA12019
Crowder FlatCALIFORNIA12007
SquirrelIDAHO11971
PicaboIDAHO11990
Mud LakeIDAHO11988
PrestonIDAHO11991

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