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Species · Mississippi · BBS 2026 Release · 1966–2025

Northern Mockingbird Population Trend in Mississippi

All statesGeneralists

Northern Mockingbird in Mississippi has fallen sharply: down 70% on the route-weighted index since 1968.

-70%Since 1968TrendPercent 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 →
74Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
59YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

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

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Northern Mockingbird has fallen sharply in Mississippi: down 70% on the route-weighted index since 1968.

Northern Mockingbird Population Forecast in Mississippi

If the recent trend holds, Northern Mockingbird in Mississippi is projected to rise about 12% by 2030 — from 13 in 2025 to a central estimate of 15 (95% range 5.7–24). A 5-year backtest shows a typical error of ±45.9%, with 100% of held-out values landing inside the 95% band.

+12%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 →
15Projected 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 →
5.7–2495% 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 →
±45.9%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 Mississippi is projected to rise about 12% by 2030 — from 13 in 2025 to a central estimate of 15 (95% range 5.7–24). A 5-year backtest shows a typical error of ±45.9%, with 100% of held-out values landing inside the 95% band.19662030
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 →
2026177.426
2027167.025
2028166.525
2029156.125
2030155.724

Northern Mockingbird Survey Routes in Mississippi

Routes recording Northern Mockingbird in Mississippi.
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 →
Mt Carmel7120161974
Tupelo5220221966
Duffee5120081973
Poplarville4619781972
Okatibbee L.4620081995
Cybur4520191966
Olive Branch4320011966
Lake3820251966
Aberdeen3820251970
Necaise3620221982
Waynesboro3520101966
Leaf River3420132008
Walthall3319871970
Tchula 23119941976
Olive Branch 23120222016
Amite River2820132008
Latimer 22820232021
Fontainbleau2719781966
Cockrum2520241966
Neely2520121974
Diberville2319871979
Star2320252016
Latimer2220191988
Forest2020251972
Commerce1919931966

Northern Mockingbird Population Trend in Other States

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

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