Here are some mammals that are semi-aquatic and live near ponds:
* Beavers: These rodents are known for their dams and lodges built on or near ponds and streams.
* Muskrats: These rodents are also excellent swimmers and often live in ponds, building lodges and burrows along the banks.
* Otters: Otters, both river otters and sea otters, are skilled swimmers and spend much of their time in and around water, including ponds.
* Water shrews: These small, insectivorous mammals are found near water and can even swim underwater.
* Water voles: These rodents are similar to muskrats and also build burrows and lodges near ponds.
Important Note: While these mammals spend a lot of time in or near ponds, they do not undergo a metamorphosis like amphibians and still require land for resting, breeding, and raising their young.