This unit contains an ebook, worksheets, presentation and teacher notes for how to use the materials. Students will learn that ostriches are the tallest and heaviest bird, and as a result they are not able to fly. They are flightless. They move by walking or running, and are able to use their legs to kick if they are attacked. Ostriches eat insects, seeds, and small animals. They are vertebrates and have feathers. They lay very big eggs in their nests, which are made by digging in the dirt.