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 Black Guillemot. The Black Guillemot or Tystie, Cepphus grylle, is a medium-sized alcid at 32-38 cm in length and with a 49-58 cm wingspan
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C. Chordates ( Phylum Chordata) are a group of Animals that includes the Vertebrates together with several closely related Invertebrates Birds ( class Aves) are bipedal endothermic ( Warm-blooded) Vertebrate animals that lay eggs. Charadriiformes is a diverse order of small to medium-large Birds It includes about 350 Species and has members in all parts of the world This article is about a family of birds For the American ornithological journal see The Auk. Peter Simon Pallas ( September 22, 1741, Berlin — September 8, 1811, Berlin) was a German Zoologist grylle |
Cepphus is a genus of seabirds in the auk family also referred to as true guillemots or, in North America, simply as guillemots. Seabirds are Birds that have adapted to life within the marine environment This article is about a family of birds For the American ornithological journal see The Auk. Guillemot is the Common name for several species of Seabird in the Auk family comprising two genera Uria and Cepphus These are medium-sized birds with mainly black plumage in the breeding season, thin dark bills and red legs and feet. Two species have white wing patches, the third has white facial “spectacles”. They are much paler in winter plumage, mottled above and white below.
The breeding habitat is rocky shores and islands on the coasts of the northern Atlantic and Pacific Oceans. The Pacific Ocean is the largest of the Earth 's Oceanic divisions They usually lay their eggs in rocky sites near water.
These birds may overwinter in their breeding areas, moving to open waters if necessary, but usually not migrating very far south. Bird migration refers to the regular seasonal journeys undertaken by many species of Birds Bird movements include those made in response to changes in food availability
They dive for food from the surface, swimming underwater. They mainly eat fish and crustaceans, also some molluscs, insects and plant material. Fish are aquatic Vertebrate animals that are typically ectothermic (previously Cold-blooded) covered with scales, and equipped with two Structure of crustaceans As Arthropods crustaceans have a stiff Exoskeleton, which must be shed to allow the animal to grow ( Ecdysis or molting Molluscs are animals belonging to the phylum Mollusca. There are around 250000 extant Species within the phylum with an estimated 70000 Insects ( Class Insecta) are a major group of Arthropods and the most diverse group of Animals on the Earth with over a million described
The species are:
- Black Guillemot or Tystie, Cepphus grylle
- Pigeon Guillemot, Cepphus columba
- Spectacled Guillemot, Cepphus carbo
There are also fossil forms
- Cepphus olsoni (San Luis Rey River Late Miocene - Early Pliocene of W USA)
- Cepphus cf. The Black Guillemot or Tystie, Cepphus grylle, is a medium-sized alcid at 32-38 cm in length and with a 49-58 cm wingspan The Pigeon Guillemot ( Cepphus columba) is a medium-sized alcid endemic to the Pacific. The Spectacled, or Sooty Guillemot, Cepphus carbo, is a Seabird in the Auk family columba (Lawrence Canyon Early Pliocene of W USA)
- Cepphus cf. grylle (San Diego Late Pliocene, W USA)
The latter two resemble the extant species, but because of the considerable distance in time or space from their current occurrence may represent distinct species.
References
- Seabirds, an Identification Guide by Peter Harrison, (1983) ISBN 0-7470-1410-8
- Handbook of the Birds of the World Vol 3, Josep del Hoyo editor, ISBN 84-87334-20-2
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