In the Southern Hemisphere, summer distribution based upon historic catch data is between 40°S and 50°S latitude in the South Atlantic and southern Indian Oceans and 45°S and 60°S in the South Pacific, while winter distribution is poorly known, with former winter whaling grounds being located off northeastern Brazil (7°S) and Peru (6°S). The majority of the "sei" whales caught off Angola and Congo, as well as other nearby areas in equatorial West Africa, are thought to have been predominantly misidentified Bryde's whales. For example, Ruud (1952) found that 42 of the "sei whale" catch off Gabon in 1952 were actually Bryde's whales, based on examination of their baleen plates. The only confirmed historical record is the capture of a female, which was brought to the Cap Lopez whaling station in Gabon in September 1950. During cetacean sighting surveys off Angola between 2003 and 2006, only a single confirmed sighting of two individuals was made in August 2004, compared to 19 sightings of Bryde's whales. Sei whales are commonly distributed along west to southern Latin America including along entire Chilean coasts, within Beagle Channel and possibly feed in the Aysen region. The Falkland Islands appears to be a regionally important area for the Sei Whale, as a small population exists in coastal waters off the eastern Falkland archipelago. For reasons unknown, the whales prefer to stay inland here, even venturing into large bays. This provides scientists with a rare opportunity to study this normally pelagic species without having to travel far out into the ocean.