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

Northern Mockingbird Population Trend in California

All statesGeneralists

Northern Mockingbird in California has edged up: up 18% on the route-weighted index since 1970.

+18%Since 1970
186Routes In State
56Years

Notable Northern Mockingbird Trends in California

No notable trend signals for Northern Mockingbird in California. See the full index history below.

Northern Mockingbird Population Forecast in California

If the recent trend holds, Northern Mockingbird in California is projected to fall about 37% by 2029 — from 6.5 in 2024 to a central estimate of 4.1 (95% range 1.6–6.7). A 5-year backtest shows a typical error of ±41.7%, with 20% of held-out values landing inside the 95% band.

-37%Change by 2029
4.1Projected 2029 index
1.6–6.795% range
±41.7%Backtest error
19682029
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
20254.21.66.7
20264.21.66.7
20274.21.66.7
20284.11.66.7
20294.11.66.7

Northern Mockingbird Survey Routes in California

Routes recording Northern Mockingbird in California.
Harbor Lake12419911973
S Catalina9220221988
Auburn5019801969
Parkfield4220241968
Moreno4120241968
Gravesboro3819951968
Barstow3819981968
Harbor Lake 23420242014
Westley3320241972
Hughson3220241968
Hollister 22920242012
Collegeville2820041968
Riovista2620241968
Maricopa2520241970
Tres Pinos 22520112005
Greenwater V2420241977
Tranquillity2420241972
Colma2319721968
Haiwee Res2320051975
Oroville2320241972
San Ysidro2220191973
Joshua Tree2220021970
Poway2019801973
Mark West2020241972
Collegeville 22020232007

Northern Mockingbird Population Trend in Other States

alabamaarizonaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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