. Bulletin of the British Ornithologists' Club. spot for the photographer), nor did I recover any carcases, but I formed the impression that the mammal did not eat many of the penguins it killed. One of the few notes I did take at the time says "A most efficient but apparently wasteful hunter'*. Towards the end of the period of observation it was joined by a second male. The film (Boswall 1972) shows the above behaviour and also that on one. Rockhopper Penguins Eudyptes crestatus turning back from entering the sea because of the waiting South American Sea Lion Otaria byronia offshore. Fra
. Bulletin of the British Ornithologists' Club. spot for the photographer), nor did I recover any carcases, but I formed the impression that the mammal did not eat many of the penguins it killed. One of the few notes I did take at the time says "A most efficient but apparently wasteful hunter'*. Towards the end of the period of observation it was joined by a second male. The film (Boswall 1972) shows the above behaviour and also that on one. Rockhopper Penguins Eudyptes crestatus turning back from entering the sea because of the waiting South American Sea Lion Otaria byronia offshore. Franklin Bay, Staten Island, Tierra del Fuego, Argentina, 21st January 1972. By Jeffery Boswell. occasion the mammal came right out of the sea on to the rocks, grabbed a penguin and returned to the sea with it. R. J. Prytherch had seen a mammal do this two days earlier. Summary: Published and unpublished observations on Rockhopper, Gentoo and Magellanic Penguins as prey of the South American Sea Lion suggest that the relationship may be more frequent than was previously thought. References: Boswall, Jeffery. 1972. Wildlife Safari to the Argentine No. 6: Tierra del Fuego. One 16mm. 25- minutc colour film. Bristol: BBC. Boswall, Jeffery & Prytherch, R. J. 1972. Some observations on the birds of Point Tombo, Argentina. Bull. Brit. Orn. CI. 92: 118-129. Cabrera, A. &c Yepes, J. i960. Mamiferos Sud Americanos. Buenos Aires: I'. Conway, William G. 1971. Predation on Penguins at Punta Tombo. Animal Kh August 1971: 2-8. Fanning, E. 1924. Voyages and discoveries in the South Seas 1792-/832. Salem. Hamilton, J. E. 1934. The southern sea lion Otaria byronia (de Blainvillc). Discovery Repts. 19: 121-164. Morrell, Benjamin. 1832. A narrative of four voyages to the South Sea etc. from the year tin 1S }i. New York. Murphy, R. C. 1936. Oceanic Birds of South America. New York: \rncru\in Museum of Natural 1 listory. 131. Please note that these images are extracted from scanned page i
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