BirdAnalyst
Species · BCR 29 · BBS 2025 Release · 1966–2024

Dickcissel In Piedmont

All regionsPiedmontGrassland birds

Dickcissel in Piedmont has risen sharply: up 58% on the route-weighted index since 1980.

+58%Since 1980TrendPercent 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 →
30Routes 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 →
37YearsYears 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 →

Dickcissel has risen sharply in Piedmont: up 58% on the route-weighted index since 1980.

Dickcissel In Piedmont Population Forecast

If the recent trend holds, Dickcissel in Piedmont is projected to rise about 111% by 2029 — from 0.06 in 2024 to a central estimate of 0.12 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±97.4%, with 100% of held-out values landing inside the 95% band.

+111%Change by 2029TrendPercent 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 →
0.12Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.2395% 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 →
±97.4%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, Dickcissel in Piedmont is projected to rise about 111% by 2029 — from 0.06 in 2024 to a central estimate of 0.12 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±97.4%, with 100% of held-out values landing inside the 95% band.19702029
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 →
20250.110.000.23
20260.110.000.23
20270.120.000.23
20280.120.000.23
20290.120.000.23

Routes In Piedmont

Routes recording Dickcissel in Piedmont.
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 →
DavidVIRGINIA62000
AthensGEORGIA52024
WacoNORTH-CAROLINA42004
FlayNORTH-CAROLINA42005
EmmitsburgMARYLAND32023
MonticelloNORTH-CAROLINA32018
AspersPENNSYLVANIA31988
JoannaSOUTH-CAROLINA32006
StockbridgeGEORGIA22014
Sunny SideGEORGIA22018
Mooresville 2NORTH-CAROLINA22023
WilgroveNORTH-CAROLINA22019
LanettALABAMA11993
MaxeysGEORGIA12011
SiloamGEORGIA11995
RutledgeGEORGIA12021
HebronGEORGIA12005
Silver SpgMARYLAND11980
RandallstownMARYLAND11980
IjamsvilleMARYLAND12017
YoungsvilleNORTH-CAROLINA12017
OwingsSOUTH-CAROLINA11996
CampobelloSOUTH-CAROLINA12018
AndersonSOUTH-CAROLINA12017
ChesneeSOUTH-CAROLINA12011

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