First killer whale calls recorded in Antarctica
HSWRI researchers recorded for the first time killer whale calls in the Antarctic at McMurdo Station in January 1980. These killer whale calls were compared to other researchers’ recordings from Newfoundland to search for geographic differences. The researchers found that strong geographic differences were found in all four types of vocalizations (clicks, buzzes, screams, and whistles). 
Publications:
Awbrey, F.T., J.A. Thomas, W.E. Evans and S. Leatherwood. 1982. Ross Sea killer whale vocalizations: preliminary description and comparison with those of some northern hemisphere killer whales. Reports of the International Whaling Commission 32:667-670.
Jehl, J.R., Jr., W.E. Evans, F.T. Awbrey and W.S. Drieschmann. 1980. Distribution and geographic variation in the killer whale (Orcinus orca) populations of the Antarctic and adjacent waters. Antarctic Journal of the United States 15:161-163.