BirdAnalyst
Species · BCR 5 · BBS 2025 Release · 1966–2024

Anna's Hummingbird In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestGeneralists

Anna's Hummingbird in Northern Pacific Rainforest has surged: up 231% on the route-weighted index since 1971.

+231%Since 1971TrendPercent 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 →
81Routes 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 →
55YearsYears 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 →

Anna's Hummingbird has surged in Northern Pacific Rainforest: up 231% on the route-weighted index since 1971.

Anna's Hummingbird In Northern Pacific Rainforest Population Forecast

If the recent trend holds, Anna's Hummingbird in Northern Pacific Rainforest is projected to stay roughly flat through 2029, near 0.48 (95% range 0.21–0.75). A 5-year backtest shows a typical error of ±33.6%, with 80% of held-out values landing inside the 95% band.

-5%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 →
0.48Projected 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 →
0.21–0.7595% 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 →
±33.6%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, Anna's Hummingbird in Northern Pacific Rainforest is projected to stay roughly flat through 2029, near 0.48 (95% range 0.21–0.75). A 5-year backtest shows a typical error of ±33.6%, with 80% of held-out values landing inside the 95% band.19692029
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 →
20250.470.200.73
20260.470.200.74
20270.470.200.74
20280.480.210.75
20290.480.210.75

Routes In Northern Pacific Rainforest

Routes recording Anna's Hummingbird in Northern Pacific Rainforest.
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 →
WedderburnOREGON82024
Fish RockCALIFORNIA72014
Burnt RanchCALIFORNIA62013
Warm BeachWASHINGTON62017
WinberryOREGON52023
DerbyOREGON41990
GlasgowOREGON42023
EverettWASHINGTON42024
AlderpointCALIFORNIA32012
AdairOREGON32024
Hazel CampOREGON32022
McminnvilleOREGON32019
Warm Beach 2WASHINGTON32024
Raymond 2WASHINGTON32022
DeceptionWASHINGTON32018
HolmesCALIFORNIA22024
HullvilleCALIFORNIA22019
OrleansCALIFORNIA22009
Mt ShastaCALIFORNIA22018
South Fork MtnCALIFORNIA22022
TualatinOREGON22024
DaytonOREGON22024
Secret ValOREGON22004
Emigrant LkOREGON22000
CoquilleOREGON22024

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