There was a bird in the marsh at Chesapeake Bay Environmental Center that was unexpected for me. Four Tri-colored Herons had somehow dropped in along their migration route. I associate these birds more with Florida than with Maryland, so to see their colorful presence was truly a gift.
They used to be called a Louisiana heron, and with their new name are known to grace the marshes in the southern and eastern coasts of the United States. Of course, they have the smarts to winter in Central America and Baja Mexico.