The common greenshank (Tringa nebularia) is a medium-sized slim wader with a dark grey back and upper wings with white fringes giving a scaly appearance. The head and neck are finely patterned with white and grey-green streaks. The under parts are almost entirely white. One of the key identification features is the white rump extending up the back and mantle, seen as a white V separating the wings in flight. No wing bar. Barred tail. Greenshanks are among the few waders to eat mainly fish (which makes up one quarter of their diet). They focus on small fish. They also eat prawns, molluscs and insects. During breeding season, they feed mainly on insects.