This unit contains an ebook, worksheets, presentation and detailed teacher notes for how to use the materials. Students will learn that birds have beaks, which is a characteristic of this living organism. They use their beaks for many things. The size of a bird’s beak in an indicator of whether it eats small or large things. Small birds eat berries and other small things. Birds with a big beak hunt and can eat larger things, like fish. Birds use their beaks to fight, preen, carry, build nests, and feed their babies.