Thanks to nature parks such as Zuiderpark and Het Park, Rotterdam is teeming with urban wildlife, including many common and rare birds such as herons, swans, geese and the lively parakeet. Numerous fish and waterfowl can be seen in the canals and rivers. The city's green spaces, such as the Trompenburg Arboretum, are not wilderness, but they are home to small mammals, insects and an impressive variety of plants. Turtles, frogs and newts can often be seen in the city's ponds.