BirdAnalyst
Species · BCR 9 · BBS 2026 Release · 1966–2025

Northern Mockingbird In Great Basin

All regionsGreat BasinGeneralists

Northern Mockingbird in Great Basin has held roughly steady: down 3% on the route-weighted index since 1970.

-3%Since 1970TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
89Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

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

Northern Mockingbird In Great Basin Population Forecast

If the recent trend holds, Northern Mockingbird in Great Basin is projected to rise about 66% by 2030 — from 0.51 in 2025 to a central estimate of 0.85 (95% range 0.38–1.3). A 5-year backtest shows a typical error of ±23.1%, with 100% of held-out values landing inside the 95% band.

+66%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.85Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.38–1.395% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±23.1%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Northern Mockingbird in Great Basin is projected to rise about 66% by 2030 — from 0.51 in 2025 to a central estimate of 0.85 (95% range 0.38–1.3). A 5-year backtest shows a typical error of ±23.1%, with 100% of held-out values landing inside the 95% band.19682030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20260.810.341.3
20270.820.351.3
20280.830.361.3
20290.840.371.3
20300.850.381.3

Routes In Great Basin

Routes recording Northern Mockingbird in Great Basin.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Iron SpringsUTAH152023
Ruby Valley 2NEVADA142021
GandyUTAH142015
FrenchmanNEVADA121978
CalienteNEVADA92025
Desert NwrNEVADA82024
Oak CityUTAH82024
Iron Springs 2UTAH82025
WendoverUTAH62011
DeltaUTAH62025
Jericho JunctionUTAH62025
Tule ValleyUTAH62013
Toiyabe NfNEVADA52024
FallonNEVADA52025
PromontoryUTAH52025
Wah WahUTAH52004
NewcastleUTAH52022
Darroughs Hot SpgsNEVADA42024
CallaoUTAH42025
CortezNEVADA32024
Majors PlaceNEVADA32025
WillisNEVADA32025
MinervaNEVADA32024
HikoNEVADA32025
LeamingtonUTAH32017

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.