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Species · BCR 20 · BBS 2026 Release · 1966–2025

Summer Tanager In Edwards Plateau

All regionsEdwards PlateauForest birds

Summer Tanager in Edwards Plateau has surged: up 257% on the route-weighted index since 1969.

+257%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 →
19Routes 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 →

long arc increasecomputed 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 →

Summer Tanager has surged in Edwards Plateau: up 257% on the route-weighted index since 1969.

Summer Tanager In Edwards Plateau Population Forecast

If the recent trend holds, Summer Tanager in Edwards Plateau is projected to rise about 25% by 2030 — from 8.8 in 2025 to a central estimate of 11 (95% range 7.9–14). A 5-year backtest shows a typical error of ±14.7%, with 80% of held-out values landing inside the 95% band.

+25%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 →
11Projected 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 →
7.9–1495% 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 →
±14.7%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, Summer Tanager in Edwards Plateau is projected to rise about 25% by 2030 — from 8.8 in 2025 to a central estimate of 11 (95% range 7.9–14). A 5-year backtest shows a typical error of ±14.7%, with 80% 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 →
2026107.313
2027107.414
2028117.614
2029117.814
2030117.914

Routes In Edwards Plateau

Routes recording Summer Tanager in Edwards Plateau.
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 →
HarperTEXAS182025
Allen CreekTEXAS182025
LeakeyTEXAS152025
MontellTEXAS132025
San SabaTEXAS122025
UtopiaTEXAS112025
AdamsvilleTEXAS92025
Pidcoke 2TEXAS92025
Indian MtnTEXAS82025
Prairie Mtn.TEXAS82025
RockspringTEXAS62025
BoerneTEXAS52025
Valley SpgsTEXAS52025
PidcokeTEXAS22017
Dripping SpgTEXAS22025
GeorgetownTEXAS11976
FitzhughTEXAS11982
KempnerTEXAS12025
LeanderTEXAS12005

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