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

Bank Swallow Population Trend in Maryland

All statesAerial insectivores

Bank Swallow in Maryland has collapsed: down 82% on the route-weighted index since 1968.

-82%Since 1968
30Routes In State
57Years

Notable Bank Swallow Trends in Maryland

long arc declinecomputed index

Bank Swallow has collapsed in Maryland: down 82% on the route-weighted index since 1968.

Bank Swallow Population Forecast in Maryland

If the recent trend holds, Bank Swallow in Maryland is projected to fall about 100% by 2029 — from 0.12 in 2024 to a central estimate of 0.00 (95% range 0.00–2.2). A 5-year backtest shows a typical error of ±301%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–2.295% range
±301%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
20250.000.002.2
20260.000.002.2
20270.000.002.2
20280.000.002.2
20290.000.002.2

Bank Swallow Survey Routes in Maryland

Routes recording Bank Swallow in Maryland.
Madonna6420102010
Piney Neck620191966
Northeast519941966
Matthews519661966
Davidsnville520241983
Williamsport420231986
Upper Xrds419701970
Jones419751975
Hughesville419971993
Theodore420131971
Millington420061968
Bachman Mill219941987
Van Bibber219661966
Broomes Isl219831971
Tall Timbers219721972
Elkton219681966
Harmony220171976
Emmitsburg120172017
Olney120152015
Pleasant Val119941967
Eklo119791979
Beltsville119901966
Pomfret120132013
Melitota119961967
Honga119891968

Bank Swallow Population Trend in Other States

alabamaalaskaarkansascaliforniacoloradoconnecticutdelawareidahoillinoisindianaiowakansaskentuckymainemassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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