Big Idea: Complex roles and relationships contribute to diversity of ecosystems.

5 images of invertebrates such as spiders and scorpions characterized by having 4 pairs of segmented legs, 2 main body parts and simple eyes

12 images of some birds such as seagulls, puffins, ducks and Canada Geese that live on or around freshwater or saltwater habitats

4 images of some birds such as emus and penguins that have less developed or small wings and have evolved over time not to be able to fly

4 images of some birds that are heavy-bodied and ground feeders such as turkeys, pheasants and peacocks