BirdAnalyst
Species · BCR 36 · BBS 2026 Release · 1966–2025

Northern Mockingbird In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsGeneralists

Northern Mockingbird in Tamaulipan Brushlands has declined: down 48% on the route-weighted index since 1969.

-48%Since 1969TrendPercent 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 →
28Routes 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 →
58YearsYears 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 Tamaulipan Brushlands. See the full index history below.

Northern Mockingbird In Tamaulipan Brushlands Population Forecast

If the recent trend holds, Northern Mockingbird in Tamaulipan Brushlands is projected to stay roughly flat through 2030, near 50 (95% range 14–85). A 5-year backtest shows a typical error of ±18.3%, with 100% of held-out values landing inside the 95% band.

-0%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 →
50Projected 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 →
14–8595% 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 →
±18.3%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 Tamaulipan Brushlands is projected to stay roughly flat through 2030, near 50 (95% range 14–85). A 5-year backtest shows a typical error of ±18.3%, with 100% of held-out values landing inside the 95% band.19672030
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 →
2026541890
2027531789
2028521688
2029511587
2030501485

Routes In Tamaulipan Brushlands

Routes recording Northern Mockingbird in Tamaulipan Brushlands.
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 →
Millett 2TEXAS1272024
HondoTEXAS1132025
George WestTEXAS1052025
MillettTEXAS1032012
EncinalTEXAS852010
ZapataTEXAS841987
San YgnacioTEXAS841985
El SauzTEXAS732023
Catarina 2TEXAS672017
SejitaTEXAS662024
RaymondvilleTEXAS632025
Mirando CityTEXAS602025
DilleyTEXAS582025
ProgresoTEXAS522011
KingsvilleTEXAS492024
CatarinaTEXAS422010
El IndioTEXAS422007
RandadoTEXAS412025
Cavasara Cr.TEXAS242025
GuerraTEXAS232025
Encinal 2TEXAS232025
Catarina 3TEXAS232025
LaredoTEXAS232023
Pedro CreekTEXAS192010
RachalTEXAS162025

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