Key ideas for a summary of the paragraph include:
- The platypus is an Australian mammal that lays eggs, making it one of only two egg-laying mammals (the other being the echidna).
- It has a unique combination of physical features resembling different animals: webbed feet and a bill like a duck, a tail like a beaver's, and a furry body similar to an otter's.
- These adaptations make the platypus well-suited for an aquatic lifestyle.
- The platypus uses its webbed feet for swimming and its tail for steering.
- It forages for food underwater, using its bill to scoop up insects and shellfish, as well as gravel to aid in grinding its food, since it has no teeth.
- The platypus stores its food and gravel in its cheeks until it surfaces to eat.