Horned Puffin Fratercula corniculata Scientific name definitions

Despite its ubiquitous appearance as a curio in gift shops, the Horned Puffin is a poorly studied member of the auk family. Distributed throughout subarctic waters of the North Pacific, its large breeding colonies are isolated and difficult to access. Unlike its close relatives, the Atlantic Puffin (Fratercula arctica), Tufted Puffin (F. cirrhata), and Rhinoceros Auklet (Cerorhinca monocerata)—which typically nest in burrows dug into soft soil—the Horned Puffin generally nests in rock crevices and on cliffs, making it difficult to access chicks or adults for routine studies of breeding biology.

Horned Puffins are known for carrying beakfuls of small fish to their young during the breeding season, and one might rightly conclude that they are well suited to living in coastal habitats that teem with abundant forage fish such as sand lance (Ammodytes hexapterus) and capelin (Mallotus villosus). However, this image belies their pelagic diet and ecology. While adults feed mostly fish to their chicks, they themselves consume a substantial proportion of squid and other invertebrates. During the non-breeding season, adults migrate far south to oceanic waters of the central North Pacific, where diets consist largely of bathypelagic lanternfishes and squid. Juveniles migrate south to the central North Pacific immediately after fledging and may not return to coastal breeding areas for several years. Thus, the Horned Puffin is truly a pelagic species, spending most of its life at great distances from land in the company of species we more typically consider oceanic, such as albatrosses and shearwaters.

Only a handful of studies have focused on Horned Puffins, although much incidental information is available from general seabird field investigations (Petersen 1983a Petersen, M. R. (1983a). "Horned Puffin (Fratercula corniculata)." In The breeding biology and feeding ecology of marine birds in the Gulf of Alaska., edited by P. A. Baird and P. J. Gould, 401-426. Natl. Ocean. Atmos. Admin., OCSEAP Final Rep. 45: U.S. Dep. Commer. Close , Byrd et al. 1993 Byrd, G. V., E. C. Murphy, G. W. Kaiser, A. Y. Kondratiev, and Y. V. Shibaev (1993). Status and ecology of offshore fish-eating alcids (murres and puffins) in the North Pacific. In The Status, Ecology, and Conservation of Marine Birds of the North Pacific (K. Vermeer, K. T. Briggs, K. H. Morgan, and D. Siegel-Causey, Editors). Canadian Wildlife Service, Special Publication, Ottawa, ON, Canada. pp. 176-186. Close ). Sealy (Sealy 1973b Sealy, S. G. (1973b). Breeding biology of the Horned Puffin on St. Lawrence Island, Bering Sea, with zoogeographical notes on the North Pacific puffins. Pacific Science 27 (2):99-119. Close ) provided the earliest review of the biology of this species in the North Pacific, with details of breeding ecology on St. Lawrence Island. Soon after, Wehle (Wehle 1976 Wehle, D. H. S. (1976). Summer food and feeding ecology of Tufted and Horned Puffins on Buldir Island, Alaska-1975. Master's Thesis, Univ. of Alaska, Fairbanks. Close , Wehle 1980 Wehle, D. H. S. (1980). The breeding biology of the puffins: Tufted Puffin (Lunda cirrhata), Horned Puffin (Fratercula corniculata), Common Puffin (F. arctica), and Rhinoceros Auklet (Cerorhinca monocerata). Phd Thesis, Univ. of Alaska, Fairbanks. Close ) and Amaral (Amaral 1977 Amaral, M. J. (1977). A comparative breeding biology of the Tufted and Horned puffin in the Barren Islands, Alaska. Master's Thesis, Univ. of Washington, Seattle. Close ) conducted graduate studies on Horned and Tufted puffins, adding a wealth of new information on breeding biology, behavior, chick growth, diets, and habitat use in the Gulf of Alaska and the Aleutians Islands. Since then, only a few studies have added substantially to our knowledge of Horned Puffins (Hatch and Hatch Hatch and Hatch 1990a Hatch, S. A., and M. A. Hatch (1990). Breeding seasons of oceanic birds in a sub-arctic colony. Canadian Journal of Zoology 68(8):1664-1679. Close , Hatch and Hatch 1990b Hatch, S. A., and M. A. Hatch (1990). Component of breeding productivity in a marine bird community: Key factors and concordance. Canadian Journal of Zoology 68:1680-1690. Close ; Kitaysky 1996 Kitaysky, A. S. (1996). Behavioral, physiological and reproductive responses of alcids (Alcidae) to variation in food availability. Phd Thesis, Univ. of California, Irvine. Close ; Harding 2001 Harding, A. M. A. (2001). The breeding ecology of Horned Puffins Fratercula corniculata in Alaska. Master's Thesis, Univ. of Durham, England. Close ). For the future, studies of colony attendance behavior would be useful for establishing population monitoring protocols. More data on feeding ecology and breeding biology would be useful for assessing temporal and spatial variability in population biology.