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

Common Loon In BCR 4

All regionsBCR 4Wetland birds

Common Loon in BCR 4 has declined: down 49% on the route-weighted index since 1983.

-49%Since 1983
41Routes In Region
43Years

Notable Signals

No notable trend signals for Common Loon in BCR 4. See the full index history below.

Forecast

If the recent trend holds, Common Loon in BCR 4 is projected to fall about 67% by 2029 — from 0.50 in 2024 to a central estimate of 0.17 (95% range 0.00–0.90). A 5-year backtest shows a typical error of ±77.8%, with 100% of held-out values landing inside the 95% band.

-67%Change by 2029
0.17Projected 2029 index
0.00–0.9095% range
±77.8%Backtest error
19782029
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
20250.240.000.98
20260.220.000.96
20270.200.000.94
20280.180.000.92
20290.170.000.90

Routes In BCR 4

Routes recording Common Loon in BCR 4.
WillowALASKA72024
Skilak LakeALASKA41985
McgrathALASKA42022
TonsinaALASKA32018
Lake LouiseALASKA32011
Burma RoadALASKA32023
KuskulanaALASKA32024
Chena Hot SpALASKA21986
Swan Lake RdALASKA22023
WasillaALASKA21983
Moose CreekALASKA22016
Porcupine R.ALASKA22002
Ft. RichrdsnALASKA22023
Kanuti LakeALASKA22023
Galena (Short)ALASKA22022
Paxson LakeALASKA21997
Nabesna RoadALASKA22024
Mccarthy Rd2ALASKA22024
CircleALASKA12017
Birch LakeALASKA11993
SlanaALASKA12024
ChistochinaALASKA12008
MaclarenALASKA12016
MonahanALASKA12017
CantwellALASKA12013

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