BirdAnalyst
Species · BCR 4 · BBS 2025 Release · 1966–2024

Green-winged Teal In BCR 4

All regionsBCR 4Waterfowl

Green-winged Teal in BCR 4 has surged: up 100% on the route-weighted index since 1984.

+100%Since 1984
47Routes In Region
41Years

Notable Signals

long arc increasecomputed index

Green-winged Teal has surged in BCR 4: up 100% on the route-weighted index since 1984.

Forecast

If the recent trend holds, Green-winged Teal in BCR 4 is projected to fall about 48% by 2029 — from 2.2 in 2024 to a central estimate of 1.1 (95% range 0.03–2.2). A 5-year backtest shows a typical error of ±173.8%, with 100% of held-out values landing inside the 95% band.

-48%Change by 2029
1.1Projected 2029 index
0.03–2.295% range
±173.8%Backtest error
19822029
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
20251.10.002.2
20261.10.002.2
20271.10.012.2
20281.10.022.2
20291.10.032.2

Routes In BCR 4

Routes recording Green-winged Teal in BCR 4.
SlanaALASKA192024
Hather CreekALASKA122024
Mud RiverALASKA112024
Unalakleet RiverALASKA82024
Kanuti CanynALASKA62024
Anvik RiverALASKA52024
Kanuti LakeALASKA52024
Bear CreekALASKA41990
Chena Hot Spring 2ALASKA42021
Pinoche Tral (Short)ALASKA41984
MaclarenALASKA32024
KalifonskyALASKA32016
ChickenALASKA32024
Paxson LakeALASKA31996
Mccarthy Rd2ALASKA31999
ChistochinaALASKA22023
L SalchaALASKA22002
Chena Hot SpALASKA21987
SourdoughALASKA22000
Hatcher PassALASKA22012
WasillaALASKA21983
PetersvilleALASKA22003
KachemakALASKA21998
Burma RoadALASKA22001
Donelly DomeALASKA22019

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