The hooked bill of the Laysan albatross is used to pluck squid and other floating food from the surface of the ocean. This is how it also finds a lot of plastics that look like food because plastics float. The wood stork or wood ibis, a wading bird, meanders through the water waving its large decurved beak around near its feet. The cormorant, a bird common to many areas of North America, swims underwater for its meals. It hooks or stabs its fish underwater, then surfaces and throws the fish up into the air before swallowing it whole.
Some Asian fishermen use cormorants as fishing poles.
They will tie a string around the bird's neck, let it swim around and catch a fish, then reel it in and remove the fish. The string won't let the cormorant's neck expand to swallow so the fisherman gets the fish intact. All of these feeding techniques are adaptations to allow the birds to utilize a specific food resource that not all other animals can use. Split your students into three even groups. Give each group one type of beak to use.