Ponds are small bodies of fresh water that can sometimes be covered in algae. They provide habitat for many different types of animals like fish, frogs, turtles, insects, and birds. Plants commonly found in ponds include algae, lily pads, water ferns, and duckweed. Many animals use camouflage and adapt to moving between the water and land, while pond plants have roots that take in oxygen from the muddy bottom. Ponds can form in natural depressions or man-made holes and support a variety of wildlife.