Animalia > Chordata > Aves > Procellariiformes > Procellariidae > Puffinus > Puffinus opisthomelas

Puffinus opisthomelas (Black-vented Shearwater)

Synonyms: Puffinus puffinus opisthomelas
Language: French; Spanish

Wikipedia Abstract

The black-vented shearwater (Puffinus opisthomelas) is a species of seabird. The bird is 30–38 cm in size, with a 76–89 cm wingspan. Formerly considered a subspecies of the Manx shearwater, its actual relationships are unresolved. The black-vented shearwater is thought to feed on mainly small fish. This bird nests in burrows and caves; it is a colonial nester.
View Wikipedia Record: Puffinus opisthomelas

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 6.48451
EDGE Score: 2.70598


Adult Weight [1]  408 grams
Birth Weight [3]  55 grams
Breeding Habitat [2]  Coastal cliffs and islands, Coastal marine
Wintering Geography [2]  Pacific Coast
Wintering Habitat [2]  Coastal marine, Pelagic
Diet [4]  Piscivore
Diet - Fish [4]  100 %
Forages - Water Surface [4]  50 %
Forages - Underwater [4]  50 %
Clutch Size [3]  1
Global Population (2017 est.) [2]  160,000
Incubation [3]  51 days
Wing Span [1]  32 inches (.81 m)


Name Countries Ecozone Biome Species Report Climate Land
Baja California desert Mexico Nearctic Deserts and Xeric Shrublands

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
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
Farallon National Wildlife Refuge IV 352 California, United States
Point Reyes National Seashore II 27068 California, United States
Redwood National Park II 77867 California, United States
Reserva de la Biosfera El Vizcaino Biosphere Reserve VI 6176727 Mexico  
Santa Cruz Island Preserve Nature Conservancy - Preserve 46021 California, United States
Santa Monica Mountains National Recreation Area V 38440 California, United States

Biodiversity Hotspots

Name Location Endemic Species Website
California Floristic Province Mexico, United States Yes

Prey / Diet

Engraulis mordax (Californian anchoveta)[1]
Sardinops sagax (Australian pilchard)[1]
Scomber japonicus (Striped mackerel)[5]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Balaenoptera borealis (Sei Whale)1
Balaenoptera edeni (Bryde's whale)1
Callorhinus ursinus (Northern Fur Seal)1
Cerorhinca monocerata (Rhinoceros Auklet)1
Delphinus delphis (Short-beaked Saddleback Dolphin)1
Eschrichtius robustus (Gray Whale)1
Fratercula cirrhata (Tufted Puffin)2
Gavia pacifica (Pacific Loon)1
Lagenorhynchus obliquidens (Pacific White-sided Dolphin)2
Larus crassirostris (Black-tailed Gull)1
Larus occidentalis (Western Gull)1
Larus schistisagus (Slaty-backed Gull)1
Leptocottus armatus (Cabezon)1
Mirounga angustirostris (Northern Elephant Seal)1
Myotis vivesi (fish-eating bat)1
Phocoena phocoena (Harbor Porpoise)1
Phocoenoides dalli (Dall's Porpoise)1
Prionace glauca (Tribon blou)1
Puffinus griseus (Sooty Shearwater)1
Sebastes caurinus (Copper rockfish)1
Seriphus politus (Drum)1
Sula leucogaster (Brown Booby)1
Sula nebouxii (Blue-footed Booby)1
Tursiops truncatus (Bottlenosed Dolphin)2
Uria aalge (Common Murre)1
Zalophus californianus (California Sealion)1


Corvus corax (Northern Raven)[1]
Falco peregrinus (Peregrine Falcon)[1]
Larus occidentalis (Western Gull)[1]

Range Map

North America;



Attributes / relations provided by
1Keitt, B.S., Tershy, B.R. & Croll, D.A. 2000. Black-vented Shearwater (Puffinus opisthomelas) In: Poole, A. & Gill, F. (Eds). The birds of North America. No. 521. Philadelphia & Washington, DC: Academy of Natural Sciences & the American Ornithologists’ Union.
2Partners in Flight Avian Conservation Assessment Database, version 2017. Accessed on January 2018.
3Breeding biology and conservation of the Black-vented Shearwater Puffinus opisthomelas, Bradford S. Keitt, Bernie R. Tershy & Donald A. Croll, Ibis (2003), 145: 673–680
4Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
5Szoboszlai 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