The best time to see Horseshoe Crabs & Red Knots in 2027 is Mid-May to mid-June 2027.
Timing status: Natural timing window.
Spawning & migration · Mid-May to mid-June 2027
Annual · full-moon tides
The largest horseshoe crab spawning on Earth feeds a flood of migrating shorebirds at once.
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.
older than the dinosaurs: 450 million years
Where it is visible: Delaware Bay, USA
Peaks on the high tides around the May and June full and new moons.
Horseshoe Crabs & Red Knots 2027: Mid-May to mid-June 2027.
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