BirdAnalyst
Species · Nevada · BBS 2025 Release · 1966–2024

Tree Swallow Population Trend in Nevada

All statesAerial insectivores

Tree Swallow in Nevada has collapsed: down 83% on the route-weighted index since 1973.

-83%Since 1973
14Routes In State
22Years

Notable Tree Swallow Trends in Nevada

long arc declinecomputed index

Tree Swallow has collapsed in Nevada: down 82% on the route-weighted index since 1973.

Tree Swallow Population Forecast in Nevada

If the recent trend holds, Tree Swallow in Nevada is projected to rise about 64% by 2026 — from 0.16 in 2021 to a central estimate of 0.26 (95% range 0.00–1.8). A 5-year backtest shows a typical error of ±669.4%, with 100% of held-out values landing inside the 95% band.

+64%Change by 2026
0.26Projected 2026 index
0.00–1.895% range
±669.4%Backtest error
19682026
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
20220.300.001.9
20230.290.001.9
20240.280.001.9
20250.270.001.9
20260.260.001.8

Tree Swallow Survey Routes in Nevada

Routes recording Tree Swallow in Nevada.
Fallon8219981996
Dinner Sta2019681968
Ruby Valley1920001997
Majors Place720121971
Minerva620141991
Ruby Valley 2520072006
Jarbidge420122007
Comins Lake420122005
Nixon420211973
Gardnerville420062000
Sand Pass120182018
Rye Patch119731973
Humboldt Nf120052005
Mill City120132013

Tree Swallow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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