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Species · Maine · BBS 2025 Release · 1966–2024

Killdeer Population Trend in Maine

All statesShorebirds

Killdeer in Maine has collapsed: down 91% on the route-weighted index since 1968.

-91%Since 1968
60Routes In State
58Years

Notable Killdeer Trends in Maine

long arc declinecomputed index

Killdeer has collapsed in Maine: down 91% on the route-weighted index since 1968.

Killdeer Population Forecast in Maine

If the recent trend holds, Killdeer in Maine is projected to fall about 100% by 2029 — from 0.16 in 2024 to a central estimate of 0.00 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±225.2%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–1.295% range
±225.2%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
20250.000.001.2
20260.000.001.2
20270.000.001.2
20280.000.001.2
20290.000.001.2

Killdeer Survey Routes in Maine

Routes recording Killdeer in Maine.
Grnd Lk Strm719931990
Eastbrook519961974
Hancock519951969
Boundary520161993
Turner420101972
Benton419801971
Westbrook320091977
Kittery Pt320011967
Deblois319991976
Charleston320041975
Ft Fairfield320051993
St David320051982
Searsport320242002
Newcastle220011971
Otisfield Gr220151966
East Troy220181972
Brooks220191977
Hermon220171966
Medway220141976
Forest Sta220001973
Clayton Lake220011985
Washburn219971979
Cornville220222012
Jefferson220081991
Cape Neddick120051973

Killdeer Population Trend in Other States

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

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