Slithering in the Shadows: The Complete Plymouth County MA, Snake Guide

Plymouth County MA – Plymouth county is unique due to its sandy outwash plains and acidic pine barrens. This specific environment supports species that are rare elsewhere in the state, such as the Eastern Hognose. While hikers in the Blue Hills or Myles Standish might worry about venomous encounters, the reality is that 99% of sightings in our county involve harmless, non-venomous species like the Common Garter or the Northern Water Snake.

Quick Intel: Identification & Safety

• The “Water Moccasin” Myth: We do not have Cottonmouths in Massachusetts. If you see a thick-bodied snake in a local cranberry bog or pond, it is almost certainly a Northern Water Snake. They are defensive, but non-venomous.
• Venomous Reality: While the Timber Rattlesnake and Copperhead are technically native to the state, they are effectively non-existent in Plymouth County. They are restricted to very small, protected pockets in other counties.
• Conservation Status: Many of our local species are currently under pressure from habitat fragmentation. Sightings of the Eastern Rat Snake or Smooth Green Snake are significant data points for local conservation.

The Golden Rule

If you encounter a snake on the trail: Give it two feet of space. Massachusetts snakes are generally shy and will only strike if they feel cornered or handled. Treat every sighting as a contribution to our natural heritage.

Photo	Species Information	Type	MA Status
	Common Garter SnakeThamnophis sirtalis	Non-venomous	Common
	DeKay’s Brown SnakeStoreria dekayi	Non-venomous	Common
	Northern Water SnakeNerodia sipedon	Non-venomous	Common
	Eastern Milk SnakeLampropeltis triangulum	Non-venomous	Common
	Northern CopperheadAgkistrodon contortrix	VENOMOUS	Endangered
	Timber RattlesnakeCrotalus horridus	VENOMOUS	Endangered

Local Guide: Identifying our slithering neighbors is key to safe hiking and conservation. This chart covers the species most likely to be found within Plymouth County—from the common backyard Garter Snake to the rare, state-listed Eastern Hognose.