BirdAnalyst
Species · BBS 2025 Release · 1966–2024

Buff-bellied Hummingbird

TrochilidaeForest birdsAmazilia yucatanensis

Buff-bellied Hummingbird has no long-term trend on record.

n/aSince n/aTrendPercent 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 →
10RoutesSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
25Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

About the Buff-bellied Hummingbird

The Buff-bellied Hummingbird (Amazilia yucatanensis) is a North American member of the Hummingbirds (Trochilidae). In this analysis it is grouped with the forest birds.

Size
3–5 in long (8–13 cm) — a tiny hovering bird (typical for the family)
Habitat
Woodlands and forest edges, including wooded suburbs and parks.
Diet
Insects and spiders gleaned from foliage and bark, with seeds and berries in season.
Range
Recorded on 10 Breeding Bird Survey routes across 1 state, most concentrated in the Gulf Coastal Prairie.
Family
Trochilidae · Forest birds

Notable Buff-bellied Hummingbird TrendsNotable 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 Buff-bellied Hummingbird. See the full index history below.

Buff-bellied Hummingbird Population Forecast

If the recent trend holds, Buff-bellied Hummingbird is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.00). A 5-year backtest shows a typical error of ±247.9%, with 100% 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 →
0.00–0.0095% 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 →
±247.9%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, Buff-bellied Hummingbird is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.00). A 5-year backtest shows a typical error of ±247.9%, with 100% of held-out values landing inside the 95% band.19882028
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 →
20240.000.000.00
20250.000.000.00
20260.000.000.00
20270.000.000.00
20280.000.000.00

Where the Buff-bellied Hummingbird Is Detected

BBS routes recording Buff-bellied Hummingbird, sized by most recent count.

Buff-bellied Hummingbird Population Trend by State

Buff-bellied Hummingbird population trend by state.
TrendPercent 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 →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →Survey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
Texas-17%199210

Buff-bellied Hummingbird Population Trend by Region

Bird Conservation Regions are the ecological unit for trends.

Buff-bellied Hummingbird population trend by Bird Conservation Region.
TrendPercent 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 →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →Survey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
Gulf Coastal Prairie-36%19964

Buff-bellied Hummingbird Conservation Status

Buff-bellied Hummingbird is tracked across BBS survey routes; no formal conservation-status flag is recorded here.

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. Trend is a route-weighted relative-abundance index, not an absolute population.