BirdAnalyst
Species · BCR 11 · BBS 2025 Release · 1966–2024

Purple Martin In Prairie Potholes

All regionsPrairie PotholesAerial insectivores

Purple Martin in Prairie Potholes has declined: down 34% on the route-weighted index since 1969.

-34%Since 1969
74Routes In Region
57Years

Notable Signals

No notable trend signals for Purple Martin in Prairie Potholes. See the full index history below.

Forecast

If the recent trend holds, Purple Martin in Prairie Potholes is projected to fall about 32% by 2029 — from 0.62 in 2024 to a central estimate of 0.42 (95% range 0.00–0.99). A 5-year backtest shows a typical error of ±31.1%, with 100% of held-out values landing inside the 95% band.

-32%Change by 2029
0.42Projected 2029 index
0.00–0.9995% range
±31.1%Backtest error
19672029
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
20250.470.001.0
20260.460.001.0
20270.450.001.0
20280.430.001.0
20290.420.000.99

Routes In Prairie Potholes

Routes recording Purple Martin in Prairie Potholes.
Turtle MtnsNORTH-DAKOTA192024
ScrantonIOWA171999
TrippSOUTH-DAKOTA151988
ErieMINNESOTA101997
BowesmontNORTH-DAKOTA101995
BroadlandSOUTH-DAKOTA101969
LennoxSOUTH-DAKOTA82024
OkleeMINNESOTA71993
ChokioMINNESOTA62024
SpartaNEBRASKA62019
CooperstownNORTH-DAKOTA62003
TitonkaIOWA51981
Eagle CreekNEBRASKA51975
NilesNORTH-DAKOTA52021
LoraineNORTH-DAKOTA52019
AbercrombieNORTH-DAKOTA52012
GeddesSOUTH-DAKOTA41970
PantherIOWA32022
HartlandMINNESOTA32017
RedstoneMONTANA32021
FormanNORTH-DAKOTA31992
Danzig 2NORTH-DAKOTA32023
WashingtonIOWA22024
KanawhaIOWA21986
ClareIOWA22009

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