Diamondback terrapin
Pale spotted skin, a patterned shell, and a life between salt and fresh water distinguish Maryland’s official state reptile.
Artwork inspired by Charles Willson Peale
A diamondback terrapin belongs to the tidal edge rather than an ordinary freshwater pond. It moves through brackish creeks and marshes, feeding on hard-shelled prey and resting or nesting on nearby land. The rings on its shell scutes and dark marks on pale skin reward a close view through binoculars, without requiring the animal to be caught.
Maryland’s official reptile is also a reminder that a state symbol need not be restricted to one state. Terrapins occupy Atlantic and Gulf coasts from Massachusetts to Texas, including Florida. Their dependence on connected marsh and nesting habitat exposes them to shoreline development, roads, and crab-pot bycatch; protecting water alone cannot preserve the whole life cycle.
- Water
- Brackish estuaries
- Prey
- Mollusks and crustaceans
- Maryland role
- State reptile since 1994
Quick guide
- Identify
- Look for pale spotted skin and concentric shell scutes.
- Observe
- Scan tidal-creek edges quietly with binoculars.
Recognize a tidal-marsh turtle
- Read the head
- Dark spots on pale skin differ from a slider’s striped head.
- Compare the shell
- Concentric scute patterns vary; use habitat and skin markings together.
- Watch the tide edge
- Look where shallow creeks meet marsh vegetation and exposed banks.
- Keep nesting space
- Watch a female from well back without blocking her overland route.
Good to know
A terrapin is not a sea turtle. Its coastal life centers on brackish estuaries, and females still need suitable land above the tide for nesting.
Notice these
- Concentric scute rings
- Spotted pale head
- Strongly webbed feet