Abstract
The regular presence at Lago Fagnano of Diomedea melanophys and Diomedea chrysostoma is confirmed with new observations, the last being the first fresh water record for the island. We also recorded in fresh water Pelecanoides sp. aff. magellani and Phalacrocorax magellanicus. The fourth nesting record of Phalacrocorax atriceps for Isla Grande, and new records of Bubulcus ibis for the Argentine section of Tierra del Fuego are established. The status of Anas sibilatrix as a breeding species in the austral section of Isla Grande is confirmed. Stercorarius skua is recorded for second time over fresh water, and a fourth report of Asio flammeus in the austral section of Isla Grande is added. Colorhamphus parvirostris is cited for second time for the argentine section of Tierra del Fuego.
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