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Delaware wildlife
Atlantic horseshoe crab
Limulus polyphemus
Delaware Bay hosts one of Earth's great horseshoe crab spawns each spring.
Best months
May · Jun
Peak spawning typically occurs in May and June on Delaware Bay beaches during high tides; check the refuge or park report for exact timing.
Where to look
Bombay Hook National Wildlife RefugePrime Hook National Wildlife RefugeCape Henlopen State Park
Conservation status
Spawns en masse each spring; tied to red-knot migration
Good to know
What is the best month to see horseshoe crabs spawning in Delaware?
Late May to early June is typical, but check the park or refuge report for precise dates.
Are horseshoe crabs dangerous to humans?
No, they are harmless to humans and do not sting or bite.
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