Horseshoe Crab Monitoring Program

Have you seen any horseshoe crabs?

Our horseshoe crab monitoring program is off to a great start thanks to all of our wonderful volunteers!

Horseshoe crabs are a unique species that have been around for over 300 million years. The Atlantic horseshoe crab (Limulus polyphemus) is classified as Vulnerable to extinction by the IUCN. This also affects shorebird species like the red knot that depend on horseshoe crab eggs for food during migration. Horseshoe crabs are also widely used in the biomedical industry for their blue blood.

Monitoring local horseshoe crab populations will help to make decisions about where management is needed. Horseshoe crab monitoring takes place during spawning at high tide during the new and full moon phases. Dedicated volunteers around Massachusetts conduct spawning beach surveys during the day and at night. Learn more here.

Let us know if you see horseshoe crabs in Plymouth: https://goo.gl/forms/8nzc1BuqdW1UddIk2

Sara Grady training volunteers at Duxbury Beach.
Sara Grady training volunteers at Duxbury Beach.
A male horseshoe crab at Stephens Field.
A male horseshoe crab at Stephens Field.