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The spur-winged goose (Plectropterus gambensis) is a large bird in the family Anatidae, related to the geese and the shelducks, but distinct from both of these in a number of anatomical features, and therefore treated in its own subfamily, the Plectropterinae. It occurs in wetlands throughout sub-Saharan Africa.

This bird is often poisonous due to its diet of blister beetles. The poison, cantharidin, is held within the tissue of the fowl resulting in poisoning of those that eat the cooked goose. 10 mg of cantharidin can kill a human.

This species often occurs in open grasslands with lakes, seasonal pools, rivers, swamps and river deltas. Large inland rivers and lakes are perhaps most commonly inhabited, with saline lakes and upland areas generally being avoided, although the species can occur to an elevation of 3,000 m in eastern Africa. It is also absent from arid zones.

Source : Wikipedia