The steamer ducks are members of the Southern Hemisphere shelducks clade Tadorninae. For ducks, the estuary is important to Shelducks and Teal. The former ""Branta" minuscula" is now placed with the prehistoric American shelducks, "Anabernicula". Grey heron, snipe, reed warblers, coots, mallard, shelducks etc. Wild shelducks, teal, and mallard also nest at the farm. Its appearance is unknown, except that its wings showed the typical color pattern of shelducks. Some other birds, mostly related to the shelducks, have "goose" as part of their names. The aviary is home to&colon; galahs, lorikeets, cockatiels, kookaburras, and shelducks, among others. Gunna supports a wide range of sea birds, as well as geese, and shelducks. Nearly 200,000 shelducks are believed to gather around the Elbe river estuary each summer. Paradise shelducks average 65 cm in length and weigh between 1.5 and 2 kg.