The Isla Deseada Scientific Use Area under Special Protection was created in 1990. It is located at the mouth of the Gallegos River and is the main breeding ground for seabirds and other birds associated with aquatic environments in the area. A total of ten species have been recorded nesting there: the imperial cormorant (with an estimated population of 3500 breeding pairs), the Magellanic penguin, the kittiwake (with an estimated breeding population of almost 24,500 specimens, which identifies it as the largest colony in the Patagonian region), the southern gull, the common skua, the witch heron and the southern pintail. The biguá, began to breed in the area very recently and the South American tern and the crested duck nest sporadically.