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Phalacrocorax auritus   (Lesson, 1831)

double-crested cormorant

Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Phalacrocorax auritus   AquaMaps   Data sources: GBIF OBIS
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Classification Common names | Synonyms | CoL | ITIS | WoRMS

Aves | Ciconiiformes | Phalacrocoracidae

Main reference References | Biblio | Coordinator | Collaborators

Lepage, D. 2007. (Ref. 7816)

Size / Weight / Age

Max length : 90.0 cm TL male/unsexed; (Ref. 94965); max. published weight: 2.6 kg (Ref. 356)

Environment

Others; freshwater; brackish

Climate / Range

Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Western Atlantic and Eastern Pacific. Tropical to boreal.

Short description

Goose-sized; black overall; long neck and tail; has webbed feet that connects its four toes, allowing it to cling to rocky cliffs and feed on shoaling fish (Ref. 94965).

Biology     Glossary (e.g. epibenthic)

A coastal species found <50 km offshore (Ref. 356). Nests in the interior of the North American continent and along the coast (Ref. 63805); on unvegetated, rocky outcroppings (Ref. 95237). Are common to abundant winter residents in freshwater and estuarine habitats in the state of Texas (Ref. 95239). Started to colonize the Great Lakes at the beginning of this century, on Lake Superior in 1913-20, and Lake Huron in 1932, returning each season and nesting from April until late September where they form dense colonies in trees or on the ground on small rocky islands. Lake Ontario supported 24% of the breeding population in 1991, and the largest colony of 5,428 nests on Little Galloo Island. Most begin to breed at 3 years of age (Ref. 95240). An opportunistic feeder (Ref. 95224). Exhibits plunge diving (Ref. 356). Generally preys on fish, often feeding in shallow waters (Ref. 95238). Feeds in river estuaries; on out-migrating juvenile salmonids (Oncorhynchus spp.) in the Columbia Basin (Ref. 95220); on alewife (Alosa pseudoharengus) and southeastern catfish (Ictalurus punctatus) (Ref. 95237); on crayfish (Orconectes sp.) (Ref. 95238); on shad (Dorosoma spp.) and sunfishes (Lepomis spp.) (Ref. 60211); on striped mullet (Mugil cephalus) and Gulf menhaden (Brevoortia patronus) in Lavaca Bay; striped mullet and Gulf toadfish (Opsanus beta) in upper Laguna Madre; typically targetting benthic fish or small schooling fishes and forage species (Ref. 95239). Average flight speed recorded at 61 km/h. (Ref. 95241). Preyed on by the bald eagle, Haliateeus leucocephalus (Ref. 95220).

IUCN Red List Status (Ref. 114614)

CITES status (Ref. 94142)

Not Evaluated

Threat to humans

Human uses


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More information

Common names
Synonyms
Predators
Reproduction
Maturity
Spawning
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
Morphology
Larvae
Abundance
References
Mass conversion

Internet sources

BHL | BOLD Systems | Check for other websites | Check FishWatcher | CISTI | DiscoverLife | FAO(Publication : search) | GenBank (genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | ispecies | National databases | PubMed | Scirus | FishBase | Tree of Life | uBio | uBio RSS | Wikipedia (Go, Search) | Zoological Record

Estimation of some characteristics with mathematical models

Price category (Ref. 80766)