- Report a Sighting
- Join the Horseshoe Crab Survey
- Just flip 'em!™ Program
- Community Sanctuaries
- Create a Historical Record
- Teacher Resources
- Horseshoe Crabs & the Arts Competition
- Become an ERDG member
- Make a Donation
- Contribute to the Conservation Fund
- Sponsorship Opportunities
Horseshoe Crab Sightings
Click on a state or country name for horseshoe crab sighting locations.
If you have seen horseshoe crabs in a location not yet listed, please let us know!