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Two days ago, the 2021 Horseshoe Crab season was at its peak with bright sunny skies during the day and a full moon at night. Horseshoe Crabs (which are not really crabs), came ashore and gathered along the geotubes in front of East Point Lighthouse. The females laid their eggs in the sand and the males attached to them tried their best to fertilize the eggs.

Geotubes and Horsehoe Crabs at East Point Lighthouse.

In late May of each year, similar mating scenes occur at many beaches in South Jersey, especially those fronting the Delaware Bay. Migratory birds swoop down to gorge themselves on the eggs. There seems to be enough eggs for such feasts. A female, which is usually 20-30% larger than a male, can produce as many as 120,000 eggs each season.

Horseshoe Crabs mating. The larger ones are females.
Birds landing on a shoreline where Horseshoe Crabs gather during their mating season.
Small island at the mouth of Oyster Creek near Fortescue, NJ where thousands of migratory birds gather to consume Horseshoe Crab eggs buried in the sand.

While I was photographing the above scene, a Bald Eagle flew overhead with a long fish, perhaps an eel, in its talons.

Bald Eagle with eel.

Not far from where I was, a Barn Swallow perched on an electric wire was looking at the scene and singing .

Barn Swallow.
Barn Swallow singing.