St Kilda is a coastal township, now classed as a suburb, 21 kilometres north-north-west of the centre of Adelaide, capital city of South Australia. With a population below 100 and a sole 4-kilometre (2.5-mile) road connecting to the nearest highway, its natural and built resources have remained relatively undisturbed. The seafront, containing a large area of mangroves, faces the Barker Inlet, which is part of the Port River estuarine area. St Kilda is an internationally recognised bird-watching area: more than 100 species of birds feed in and around the mudflats, salt lagoons, mangroves and seagrass beds.