Species · Maryland · BBS 2025 Release · 1966–2024
Little Blue Heron Population Trend in Maryland
Little Blue Heron in Maryland has edged down: down 19% on the route-weighted index since 1970.
-19%Since 1970
17Routes In State
36Years
Notable Little Blue Heron Trends in Maryland
No notable trend signals for Little Blue Heron in Maryland. See the full index history below.
Little Blue Heron Population Forecast in Maryland
If the recent trend holds, Little Blue Heron in Maryland is projected to stay roughly flat through 2028, near 0.01 (95% range 0.00–0.15). A 5-year backtest shows a typical error of ±33.6%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2028
0.01Projected 2028 index
0.00–0.1595% range
±33.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.01 | 0.00 | 0.16 |
| 2025 | 0.01 | 0.00 | 0.16 |
| 2026 | 0.01 | 0.00 | 0.16 |
| 2027 | 0.01 | 0.00 | 0.15 |
| 2028 | 0.01 | 0.00 | 0.15 |
Little Blue Heron Survey Routes in Maryland
| Sinepuxent | 4 | 1975 | 1973 |
| Walnut | 4 | 2005 | 2005 |
| Northeast | 3 | 1972 | 1972 |
| Elkton | 2 | 2018 | 1976 |
| Vienna | 2 | 1987 | 1987 |
| Severna Park | 2 | 1991 | 1991 |
| Millington | 1 | 2000 | 2000 |
| Grove Neck | 1 | 1992 | 1992 |
| Easton | 1 | 2012 | 2012 |
| Honga | 1 | 2000 | 1968 |
| Madison | 1 | 2014 | 1977 |
| Cokesbury | 1 | 2021 | 1994 |
| Newark | 1 | 2023 | 1967 |
| Snow Hill | 1 | 1973 | 1973 |
| Berlin | 1 | 1987 | 1987 |
| Indiantown | 1 | 2010 | 1979 |
| Tall Timbers | 1 | 1975 | 1972 |
Little Blue Heron Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.