Species · Delaware · BBS 2025 Release · 1966–2024
Baltimore Oriole Population Trend in Delaware
Baltimore Oriole in Delaware has collapsed: down 76% on the route-weighted index since 1968.
-76%Since 1968
14Routes In State
54Years
Notable Baltimore Oriole Trends in Delaware
long arc declinecomputed index
Baltimore Oriole has collapsed in Delaware: down 76% on the route-weighted index since 1968.
Baltimore Oriole Population Forecast in Delaware
If the recent trend holds, Baltimore Oriole in Delaware is projected to rise about 188% by 2028 — from 0.25 in 2023 to a central estimate of 0.72 (95% range 0.00–1.9). A 5-year backtest shows a typical error of ±269.1%, with 100% of held-out values landing inside the 95% band.
+188%Change by 2028
0.72Projected 2028 index
0.00–1.995% range
±269.1%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.77 | 0.00 | 2.0 |
| 2025 | 0.76 | 0.00 | 2.0 |
| 2026 | 0.74 | 0.00 | 2.0 |
| 2027 | 0.73 | 0.00 | 1.9 |
| 2028 | 0.72 | 0.00 | 1.9 |
Baltimore Oriole Survey Routes in Delaware
| Milton | 3 | 2014 | 1968 |
| Bethany Bch | 2 | 1986 | 1967 |
| Mt Pleasant | 1 | 2019 | 1966 |
| Wilmington | 1 | 2014 | 1967 |
| Harrington | 1 | 2023 | 1966 |
| Frederica | 1 | 2013 | 1966 |
| Dover | 1 | 1986 | 1967 |
| Frankford | 1 | 2008 | 1967 |
| Holleyville | 1 | 2004 | 1967 |
| Lowes Xrds | 1 | 1986 | 1980 |
| Blackbird | 1 | 2007 | 1995 |
| Millsboro | 1 | 2019 | 2019 |
| Pepperbox | 1 | 1999 | 1998 |
| Pepperbox 2 | 1 | 2022 | 2022 |
Baltimore Oriole Population Trend in Other States
alabamaarkansascaliforniacoloradoconnecticutgeorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.