This is SeaTalk: Ocean News from the University of Delaware.

The red knot makes one of the longest annual migrations on Earth. The bird travels up to 9,300 miles from wintering grounds in South America to Arctic breeding grounds. During their spring migration, most red knots stop along Delaware Bay to fuel up on the eggs of spawning horseshoe crabs. You can learn more about the red knot and five other marine-related topics — and brighten up your summer reading — by ordering Delaware Sea Grant’s set of Delaware Bay bookmarks. In addition to helpful information, each bookmark includes a full-color image in the shape of a critter — a blue crab, summer flounder, great blue heron, horseshoe crab, or red knot — or a surf board, which reminds swimmers to be aware of rip currents. To order your free set of bookmarks, call 302-831-8083 or visit deseagrant.org. This is SeaTalk, a public service announcement from the University of Delaware, the Delaware Sea Grant College Program, and this station.