When is Horseshoe Crabs & Red Knots? 2027 Dates | Trailwind

Horseshoe Crabs & Red KnotsSpawning & migration · Mid-May to mid-June 2027Annual · full-moon tidesThe 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 yearsWhere it is visible: Delaware Bay, USAPeaks on the high tides around the May and June full and new moons.Where to watch it

Slaughter Beach, Delaware, Reliable spawning beach

Mispillion Harbor, Delaware, Peak shorebird numbers

Reeds Beach, New Jersey, Red knot stopover

Frequently asked questionsWhen is Horseshoe Crabs & Red Knots 2027?Horseshoe Crabs & Red Knots in 2027 is Mid-May to mid-June 2027.See the full nature calendar

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