Animalia > Chordata > Aves > Charadriiformes > Alcidae > Cerorhinca > Cerorhinca monocerata

Cerorhinca monocerata (Rhinoceros Auklet)

Language: Spanish

Wikipedia Abstract

The rhinoceros auklet (Cerorhinca monocerata) is a seabird and a close relative of the puffins. It is the only living species of the genus Cerorhinca. Given its close relationship with the puffins, the common name rhinoceros puffin has been proposed for the species.It ranges widely across the North Pacific, feeding on small fish and nesting in seabird colonies. Its name is derived from a horn-like extension of the beak.
View Wikipedia Record: Cerorhinca monocerata

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 9.76417
EDGE Score: 2.37622


Adult Weight [1]  1.06 lbs (483 g)
Birth Weight [2]  55 grams
Female Weight [1]  1.01 lbs (456 g)
Male Weight [1]  1.12 lbs (510 g)
Weight Dimorphism [1]  11.8 %
Female Maturity [2]  3 years
Male Maturity [2]  3 years
Clutch Size [2]  1
Clutches / Year [2]  1
Incubation [2]  45 days
Maximum Longevity [2]  10 years
Migration [3]  Intracontinental
Wing Span [4]  24 inches (.615 m)


Name Countries Ecozone Biome Species Report Climate Land
Baja California desert Mexico Nearctic Deserts and Xeric Shrublands
California coastal sage and chaparral Mexico, United States Nearctic Mediterranean Forests, Woodlands, and Scrub
Kamchatka-Kurile meadows and sparse forests Russia Palearctic Boreal Forests/Taiga
Okhotsk-Manchurian taiga Russia Palearctic Boreal Forests/Taiga
South Sakhalin-Kurile mixed forests Russia Palearctic Temperate Broadleaf and Mixed Forests    

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Alaska Maritime National Wildlife Refuge Ib 2347132 Alaska, United States
Aleutian Islands Biosphere Reserve 2720489 Alaska, United States    
Cabrillo National Monument V 149 California, United States
California Coast Ranges Biosphere Reserve 153447 California, United States  
Channel Islands National Marine Sanctuary   California, United States
Channel Islands National Park II 139010 California, United States
Elkhorn Slough Preserve Nature Conservancy - Preserve Ia 964 California, United States  
Farallon National Wildlife Refuge IV 352 California, United States
Glacier Bay National Park and Preserve Ib 591068 Alaska, United States
Gulf Islands National Park National Park Reserve II 8785 British Columbia, Canada
Gwaii Haanas National Park Reserve II 366714 British Columbia, Canada
Olympic Biosphere Reserve II 922805 Washington, United States
Pacific Rim National Park Reserve II 137900 British Columbia, Canada
Point Reyes National Seashore II 27068 California, United States
Redwood National Park II 77867 California, United States
San Juan Island National Historical Park III 1674 Washington, United States
Santa Cruz Island Preserve Nature Conservancy - Preserve 46021 California, United States
Santa Monica Mountains National Recreation Area V 38440 California, United States

Important Bird Areas

BirdLife Species Factsheet: View Factsheet
Name Location  IBA Criteria   Website   Climate   Land Use 
Anthony Island Canada A4ii, A4iii  
Duke of Edinburgh Ecological Reserve Canada A4ii, A4iii
Englefield Bay Islands Canada A4ii, A4iii
Kuril islands (between Urup and Paramushir) Russia (Asian) A1, A4i, A4ii, A4iii  
Lucy Islands Canada A4ii, A4iii
Matsumaekojima islet Japan A4i, A4ii, A4iii    
Moore and Byers Islands and Banks Canada A4i, A4ii, A4iii
Scott Island Group Canada A4ii, A4iii    
Teurito island Japan A4i, A4ii, A4iii    
Tyuleniy island Russia (Asian) A1, A4i, A4ii, A4iii  
Yururito and Moyururito islets Japan A4i, A4ii

Biodiversity Hotspots

Name Location Endemic Species Website
California Floristic Province Mexico, United States No
Japan Japan No

Prey / Diet

Allosmerus elongatus (Whitebait smelt)[5]
Ammodytes americanus (inshore sand lance)[6]
Ammodytes hexapterus (Stout sand lance)[5]
Ammodytes marinus (sand eel)[6]
Ammodytes personatus (Pacific sandlance)[6]
Anoplopoma fimbria (Skil)[6]
Aulorhynchus flavidus (Tube-snout)[6]
Belone belone (Garfish)[6]
Clupea harengus (Yawling)[5]
Clupea pallasii (Pacific herring)[6]
Clupea pallasii pallasii (Pacific herring)[7]
Cololabis saira (Skipper)[5]
Cymatogaster aggregata (Shiner)[6]
Doryteuthis opalescens (california market squid)[8]
Engraulis anchoita (Anchoita)[6]
Engraulis australis (Australian anchovy)[6]
Engraulis capensis (Southern African anchovy)[6]
Engraulis encrasicolus (Southern African anchovy)[6]
Engraulis japonicus (Japanese anchovy)[6]
Engraulis mordax (Californian anchoveta)[5]
Hexagrammos decagrammus (Kelp greenling)[5]
Hypomesus pretiosus (Surf smelt)[5]
Icichthys lockingtoni (Brown rudderfish)[9]
Kondakovia longimana (Giant Warty Squid)[6]
Lampetra ayresii (Parasitic river lamprey)[6]
Mallotus villosus (Capelin)[6]
Merluccius productus (Whiting)[6]
Microgadus proximus (Tommy cod)[6]
Nansenia candida (Bluethroat argentine)[6]
Octopus rubescens (East Pacific red octopus)[9]
Oncorhynchus gorbuscha (humpbacked salmon)[9]
Oncorhynchus keta (Calico salmon)[5]
Oncorhynchus kisutch (coho salmon or silver salmon)[5]
Oncorhynchus nerka (sockeye salmon or kokanee)[9]
Oncorhynchus tshawytscha (chinook salmon or king salmon)[5]
Ophiodon elongatus (Lingcod)[6]
Porichthys notatus (Midshipman)[6]
Sardina pilchardus (European pilchard)[6]
Sardinops sagax (Australian pilchard)[6]
Scomberesox saurus (Atlantic saury)[6]
Scorpaenichthys marmoratus (Sculpin)[6]
Sebastes jordani (Slender rockfish)[6]
Spirinchus starksi (Night smelt)[7]
Sprattus sprattus (Whitebait)[6]
Syngnathus leptorhynchus (slendernosed pipefish)[6]
Theragra chalcogramma (Whiting)[9]
Trichodon trichodon (Sandfish)[5]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Aechmophorus occidentalis (Western Grebe)1
Alopias vulpinus (Zorro thresher shark)2
Anoplopoma fimbria (Skil)1
Arctocephalus townsendi (Guadalupe Fur Seal)1
Balaenoptera acutorostrata (Minke Whale)2
Balaenoptera physalus (Fin Whale)1
Brachyramphus brevirostris (Kittlitz's Murrelet)1
Brachyramphus marmoratus (Marbled Murrelet)3
Callorhinus ursinus (Northern Fur Seal)7
Calonectris leucomelas (Streaked Shearwater)1
Caulolatilus princeps (Bighead tilefish)1
Cepphus columba (Pigeon Guillemot)2
Citharichthys sordidus (Sanddab)1
Clangula hyemalis (Oldsquaw)1
Cystophora cristata (Hooded Seal)1
Dasycottus setiger (Spinyhead sculpin)1
Delphinus delphis (Short-beaked Saddleback Dolphin)3
Enhydra lutris (Sea Otter)1
Eopsetta jordani (Petrale sole)1
Erignathus barbatus (Bearded Seal)1
Eschrichtius robustus (Gray Whale)1
Eumetopias jubatus (Steller Sea Lion)3
Fratercula cirrhata (Tufted Puffin)4
Fratercula corniculata (Horned Puffin)1
Gadus macrocephalus (Pacific cod)2
Gavia arctica (Black-throated Loon)1
Genyonemus lineatus (White croaker)1
Haliaeetus leucocephalus (Bald Eagle)1
Haliaeetus pelagicus (Steller's Sea-Eagle)1
Hexagrammos stelleri (Greenling)1
Hippoglossoides elassodon (Paper sole)1
Hippoglossus stenolepis (Pacific halibut)3
Hydroprogne caspia (Caspian Tern)2
Katsuwonus pelamis (White bonito)1
Kogia breviceps (Pygmy Sperm Whale)2
Lagenorhynchus obliquidens (Pacific White-sided Dolphin)3
Lamna ditropis (Salmon shark)4
Larus californicus (California Gull)1
Larus canus (Mew Gull)1
Larus glaucescens (Glaucous-winged Gull)1
Larus heermanni (Heermann's Gull)1
Larus occidentalis (Western Gull)2
Leptocottus armatus (Cabezon)2
Lissodelphis borealis (Northern Right Whale Dolphin)2
Megaptera novaeangliae (Humpback Whale)2
Merluccius productus (Whiting)3
Mirounga angustirostris (Northern Elephant Seal)2
Morus bassanus (Northern Gannet)1
Oncorhynchus clarkii (Cutthroat trout)3
Ophiodon elongatus (Lingcod)2
Orcinus orca (Killer Whale)2
Pagophilus groenlandicus (Harp Seal)1
Phalacrocorax auritus (Double-crested Cormorant)2
Phalacrocorax pelagicus (Pelagic Cormorant)2
Phalacrocorax penicillatus (Brandt's Cormorant)1
Phoca vitulina (Harbor Seal)2
Phocoena phocoena (Harbor Porpoise)2
Phocoenoides dalli (Dall's Porpoise)4
Podiceps auritus (Horned Grebe)2
Podiceps grisegena (Red-necked Grebe)2
Prionace glauca (Tribon blou)2
Puffinus creatopus (Pink-footed Shearwater)1
Puffinus griseus (Sooty Shearwater)2
Puffinus opisthomelas (Black-vented Shearwater)1
Puffinus tenuirostris (Short-tailed Shearwater)1
Raja binoculata (Big skate)1
Raja rhina (Longnose skate)1
Rissa tridactyla (Black-legged Kittiwake)2
Sebastes caurinus (Copper rockfish)2
Sebastes crameri (Rockfish)1
Sebastes flavidus (Yellowtail rockfish)3
Sebastes goodei (Rockfish)1
Sebastes melanops (Black bass)1
Seriphus politus (Drum)1
Squalus acanthias (Common spiny)3
Sterna paradisaea (Arctic Tern)1
Synthliboramphus antiquus (Ancient Murrelet)1
Theragra chalcogramma (Whiting)2
Thunnus thynnus (horse mackerel)1
Tursiops truncatus (Bottlenosed Dolphin)2
Uria aalge (Common Murre)4
Ursus americanus (black bear)1
Ursus arctos (Grizzly Bear)1
Zalophus californianus (California Sealion)2


Haliaeetus leucocephalus (Bald Eagle)[6]

Institutions (Zoos, etc.)

Institution Infraspecies / Breed 
Alaska SeaLife Center
Omaha's Henry Doorly Zoo
Oregon Coast Aquarium

Range Map

North America;



Attributes / relations provided by 1Gaston, AJ and Dechesne, SBC 1996. Rhinoceros Auklet (Cerorhinca monocerata). No. 212. In The birds of North America. A. Poole and F. Gill [Eds.]. Academy of Natural Sciences, Philadelphia and American Ornithologists' Union, Washington, DC 2de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774 3Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at 4Anatomy and Histochemistry of Flight Muscles in a Wing-Propelled Diving Bird, the Atlantic Puffin, Fratercula arctica, Christopher E. Kovacs and Ron A. Meyers, JOURNAL OF MORPHOLOGY 244:109–125 (2000) 5Diving depths, diet, and underwater foraging of Rhinoceros Auklets in British Columbia, Alan E. Burger, Rory P. Wilson, Don Garnier and Marie-Pierre T. Wilson, Canadian Journal of Zoology Vol. 71: 2528-2540 (1993) 6Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics. 7Food Web Relationships of Northern Puget Sound and the Strait of Juan de Fuca : a Synthesis of the Available Knowledge, Charles A. Simenstad, Bruce S. Miller, Carl F. Nyblade, Kathleen Thornburgh, and Lewis J. Bledsoe, EPA-600 7-29-259 September 1979 8CephBase - Cephalopod (Octopus, Squid, Cuttlefish and Nautilus) Database 9Szoboszlai AI, Thayer JA, Wood SA, Sydeman WJ, Koehn LE (2015) Forage species in predator diets: synthesis of data from the California Current. Ecological Informatics 29(1): 45-56. Szoboszlai AI, Thayer JA, Wood SA, Sydeman WJ, Koehn LE (2015) Data from: Forage species in predator diets: synthesis of data from the California Current. Dryad Digital Repository.
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 WWF WildFINDER
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access