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

Field Sparrow Population Trend in Florida

All statesGeneralists

Field Sparrow in Florida has collapsed: down 97% on the route-weighted index since 1968.

-97%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 →
21Routes 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 →
43YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Field Sparrow Trends in FloridaNotable 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 →

Field Sparrow has collapsed in Florida: down 97% on the route-weighted index since 1968.

Field Sparrow Population Forecast in Florida

If the recent trend holds, Field Sparrow in Florida is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±1004.2%, with 60% of held-out values landing inside the 95% band.

n/aChange by 2028TrendPercent 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 →
0.00Projected 2028 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.1795% 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 →
±1004.2%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, Field Sparrow in Florida is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±1004.2%, with 60% of held-out values landing inside the 95% band.19662028
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 →
20240.000.000.17
20250.000.000.17
20260.000.000.17
20270.000.000.17
20280.000.000.17

Field Sparrow Survey Routes in Florida

Routes recording Field Sparrow in Florida.
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 →
Kenansville619981997
Dowling Park519971987
Telogia419731970
Hildreth420091987
Micanopy319891989
Lovedale220021990
Pinetta220001993
Cross City219881988
Mossy Head119851985
Blountstown119661966
Broad Branch119911991
Miccosukee120001966
Seminole Hls119981998
Covington119921968
Belmont119721972
San Antonio119881988
Ft Lonesome119871987
Hildreth 2120232016
Blackwater119971994
Miller Xrds120172017
Alligator Pt119871987

Field Sparrow Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawaregeorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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