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

Purple Martin Population Trend in Utah

All statesAerial insectivores

Purple Martin in Utah has fallen sharply: down 63% on the route-weighted index since 1973.

-63%Since 1973
16Routes In State
41Years

Notable Purple Martin Trends in Utah

long arc declinecomputed index

Purple Martin has fallen sharply in Utah: down 63% on the route-weighted index since 1973.

Purple Martin Population Forecast in Utah

If the recent trend holds, Purple Martin in Utah is projected to fall about 22% by 2029 — from 0.09 in 2024 to a central estimate of 0.07 (95% range 0.00–0.27). A 5-year backtest shows a typical error of ±174.9%, with 100% of held-out values landing inside the 95% band.

-22%Change by 2029
0.07Projected 2029 index
0.00–0.2795% range
±174.9%Backtest error
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 index95% low95% high
20250.080.000.28
20260.070.000.28
20270.070.000.28
20280.070.000.27
20290.070.000.27

Purple Martin Survey Routes in Utah

Routes recording Purple Martin in Utah.
Saleratus Cr820041996
Promontory519741974
Woodruff420222002
Lost Cr. Res320161995
Aneth320242024
Beck219771971
Fish Lake Nf220242023
Soapstone220072007
Skyline Driv120151986
Richfield120191994
Logan Canyon120132001
Hardware Ranch120152015
Dragerton119691969
Red Spur Mtn.120222021
Beck 2120171991
Boulder119691969

Purple Martin Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawashingtonwest-virginiawisconsinwyoming

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