BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

Purple Martin In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieAerial insectivores

Purple Martin in Eastern Tallgrass Prairie has declined: down 27% on the route-weighted index since 1968.

-27%Since 1968
259Routes In Region
58Years

Notable Signals

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

Forecast

If the recent trend holds, Purple Martin in Eastern Tallgrass Prairie is projected to fall about 49% by 2029 — from 5.9 in 2024 to a central estimate of 3.0 (95% range 0.74–5.3). A 5-year backtest shows a typical error of ±39.6%, with 80% of held-out values landing inside the 95% band.

-49%Change by 2029
3.0Projected 2029 index
0.74–5.395% range
±39.6%Backtest error
19662029
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
20253.10.795.3
20263.10.785.3
20273.00.775.3
20283.00.755.3
20293.00.745.3

Routes In Eastern Tallgrass Prairie

Routes recording Purple Martin in Eastern Tallgrass Prairie.
ExlineIOWA492024
BrookvilleINDIANA392024
RensselaerMISSOURI322024
KeetonvilleOKLAHOMA322022
Ash RidgeOHIO302021
DecaturINDIANA292024
AuburnMISSOURI292024
WashingtonMISSOURI281977
WabashINDIANA272024
CollinsvilleOKLAHOMA272021
SenecaILLINOIS262024
BerneINDIANA262024
FultonOHIO242024
New HamptonMISSOURI232024
West LibertyIOWA202024
SticklervillMISSOURI202024
EmdenMISSOURI202024
BradburyILLINOIS192024
HumboldtILLINOIS192024
Mascoutah LkILLINOIS192024
PawneeILLINOIS182024
RobinsonILLINOIS182023
GalesburgKANSAS182024
AthensvilleILLINOIS172024
EubanksILLINOIS172024

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