Over-representation of bird prey in pellets of South Polar Skuas

We report the first study to compare the contents of pellets and regurgitates of South Polar Skuas, Stercorarius maccormicki, at two breeding colonies on the Antarctic Peninsula. Samples were taken across years from identified breeding pairs at Potter Peninsula in sympatry with 30–40 breeding pairs of Brown Skuas, Stercorarius antarcticus lonnbergi, and from Cierva Point with 2 pairs of Brown Skuas. In contrast to the general consensus that...