BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

Black Swift In Northern Rockies

All regionsNorthern RockiesAerial insectivores

Black Swift in Northern Rockies has fallen sharply: down 73% on the route-weighted index since 1986.

-73%Since 1986
10Routes In Region
22Years

Notable Signals

long arc declinecomputed index

Black Swift has fallen sharply in Northern Rockies: down 73% on the route-weighted index since 1986.

Forecast

If the recent trend holds, Black Swift in Northern Rockies is projected to stay roughly flat through 2018, near 0.00 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±86.6%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2018
0.00Projected 2018 index
0.00–0.0795% range
±86.6%Backtest error
19682018
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
20140.010.000.07
20150.010.000.07
20160.010.000.07
20170.000.000.07
20180.000.000.07

Routes In Northern Rockies

Routes recording Black Swift in Northern Rockies.
St RegisMONTANA61986
NorthportWASHINGTON51999
NaplesIDAHO42011
BurgdorfIDAHO41989
CurlewWASHINGTON31992
ArleeMONTANA21987
KellerWASHINGTON21968
CoolinIDAHO12001
Inside RoadMONTANA11990
Logan PassMONTANA12013

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