Viewing advice
Peaks on the high tides around the May and June full and new moons.
The best time to see Horseshoe Crabs & Red Knots in 2027 is Mid-May to mid-June 2027. Timing status: Season.
On the full- and new-moon high tides of late spring, thousands of horseshoe crabs, essentially living fossils, crawl ashore on Delaware Bay to lay their eggs. The green eggs fuel one of the hemisphere's great shorebird migrations, as red knots and others fatten up mid-journey to the Arctic. Two spectacles in one.
Where to see it
These are the spots that catch it best. Tap one to see what's worth a trip nearby.
Related natural events
More moments to explore.
Frequently asked questions
When is Horseshoe Crabs & Red Knots 2027?
Horseshoe Crabs & Red Knots 2027: Mid-May to mid-June 2027.