BirdAnalyst
Species · California · BBS 2025 Release · 1966–2024

Common Murre Population Trend in California

All statesGeneralists

Common Murre in California has collapsed: down 98% on the route-weighted index since 1975.

-98%Since 1975
3Routes In State
36Years

Notable Common Murre Trends in California

long arc declinecomputed index

Common Murre has collapsed in California: down 98% on the route-weighted index since 1975.

Common Murre Population Forecast in California

If the recent trend holds, Common Murre in California is projected to stay roughly flat through 2024, near 0.00 (95% range 0.00–2.2). A 5-year backtest shows a typical error of ±2193.7%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2024
0.00Projected 2024 index
0.00–2.295% range
±2193.7%Backtest error
19702024
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
20200.000.002.2
20210.000.002.2
20220.000.002.2
20230.000.002.2
20240.000.002.2

Common Murre Survey Routes in California

Routes recording Common Murre in California.
Honeydew320111970
Bodega Bay220191976
Fish Rock120091975

Common Murre Population Trend in Other States

alaskaoregonwashington

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