BirdAnalyst
Species · BCR 15 · BBS 2025 Release · 1966–2024

Common Poorwill In Sierra Nevada

All regionsSierra NevadaAerial insectivores

Common Poorwill in Sierra Nevada has surged: up 96% on the route-weighted index since 1978.

+96%Since 1978
10Routes In Region
25Years

Notable Signals

long arc increasecomputed index

Common Poorwill has surged in Sierra Nevada: up 96% on the route-weighted index since 1978.

Forecast

If the recent trend holds, Common Poorwill in Sierra Nevada is projected to fall about 36% by 2023 — from 0.13 in 2018 to a central estimate of 0.08 (95% range 0.03–0.13). A 5-year backtest shows a typical error of ±44.7%, with 60% of held-out values landing inside the 95% band.

-36%Change by 2023
0.08Projected 2023 index
0.03–0.1395% range
±44.7%Backtest error
19752023
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20190.080.030.13
20200.080.030.13
20210.080.030.13
20220.080.030.13
20230.080.030.13

Routes In Sierra Nevada

Routes recording Common Poorwill in Sierra Nevada.
WestvilleCALIFORNIA22018
Eagle LakeCALIFORNIA12011
WoodfordsCALIFORNIA12009
LumberyardCALIFORNIA11985
Greenhorn MtCALIFORNIA11997
Tuolumne GroveCALIFORNIA11983
GeneseeCALIFORNIA12015
GoumazCALIFORNIA12010
Pine MountainCALIFORNIA12005
Last ChanceCALIFORNIA12018

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