How are the muskrat and Australian platypus similar or different?

The muskrat and the Australian platypus are both semi-aquatic mammals, but they belong to different taxonomic groups and have distinct characteristics. Muskrats are rodents, primarily found in North America, and are known for their long tails and dense fur. In contrast, the platypus is a monotreme, native to Australia, and is unique for its egg-laying abilities and distinctive features, such as a duck-like bill and webbed feet. While both species inhabit aquatic environments, their evolutionary backgrounds and physical traits highlight significant differences.