United News International (UNI) – There’s hardly any room for sunbathers along the sandy beaches of Delaware Bay this summer — that’s because it’s overcrowded with shorebirds and gulls.  

These aquatic birds crowd together and swap viruses making Delaware Bay the most diverse spot for bird flu in the world.  

Scientists are collecting samples to test for potentially flu-infected bird droppings. It helps them understand how influenza develops and allows for better vaccine treatment.

Scientists say most bird flu viruses don’t spread easily to people. The biggest concern is the virus can be spread from wild birds to domesticated chickens, turkeys and pigs, and then possibly to people.

As a precaution, the U.S. stockpiles vaccines against worrisome strains.

The birds are migrating from South America to the Arctic and plan their layover in that exact location to eat.

Horseshoe crabs lay their eggs along Delaware Bay every spring giving these birds a perfect source of food so they can continue on their journey.