Seabird

seabirdssea birdsea birdsmarine birdsmarine birdsea-birdsbirdsseafowlmuttonbirdsnesting seabirds
Seabirds (also known as marine birds) are birds that are adapted to life within the marine environment.wikipedia
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Procellariiformes

tubenoseprocellariiformtubenoses
However, by convention all of the Sphenisciformes and Procellariiformes, all of the Pelecaniformes except the darters, and some of the Charadriiformes (the skuas, gulls, terns, auks and skimmers) are classified as seabirds. While Hesperornis is not thought to have left descendants, the earliest modern seabirds also occurred in the Cretaceous, with a species called Tytthostonyx glauconiticus, which seems allied to the Procellariiformes and Pelecaniformes.
Procellariiformes is an order of seabirds that comprises four families: the albatrosses, petrels and shearwaters, and 2 families of storm petrels.

Tern

ternsSternidaebird
However, by convention all of the Sphenisciformes and Procellariiformes, all of the Pelecaniformes except the darters, and some of the Charadriiformes (the skuas, gulls, terns, auks and skimmers) are classified as seabirds. Gannets, boobies, tropicbirds, some terns and brown pelicans all engage in plunge diving, taking fast moving prey by diving into the water from flight.
Terns are seabirds in the family Laridae that have a worldwide distribution and are normally found near the sea, rivers, or wetlands.

Skua

StercorariidaeskuasStercorarius
However, by convention all of the Sphenisciformes and Procellariiformes, all of the Pelecaniformes except the darters, and some of the Charadriiformes (the skuas, gulls, terns, auks and skimmers) are classified as seabirds.
The skuas are a group of predatory seabirds with about seven species forming the genus Stercorarius, the only genus in the family Stercorariidae.

Charadriiformes

charadriiformshorebirdswader
However, by convention all of the Sphenisciformes and Procellariiformes, all of the Pelecaniformes except the darters, and some of the Charadriiformes (the skuas, gulls, terns, auks and skimmers) are classified as seabirds.
The Sibley-Ahlquist taxonomy lumps all the Charadriiformes together with other seabirds and birds of prey into a greatly enlarged order Ciconiiformes.

Bird

birdsAvesavian
Seabirds (also known as marine birds) are birds that are adapted to life within the marine environment. While Hesperornis is not thought to have left descendants, the earliest modern seabirds also occurred in the Cretaceous, with a species called Tytthostonyx glauconiticus, which seems allied to the Procellariiformes and Pelecaniformes.
Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming.

Pelagornithidae

pseudotooth birdOdontopterygiformespelagornithid
These post-extinction seas were dominated by early Procellariidae, giant penguins and two extinct families, the Pelagornithidae and the Plotopteridae (a group of large seabirds that looked like the penguins).
The Pelagornithidae, commonly called pelagornithids, pseudodontorns, bony-toothed birds, false-toothed birds or pseudotooth birds, are a prehistoric family of large seabirds.

Manx shearwater

Puffinus puffinusManxManx shearwaters
Modern genera began their wide radiation in the Miocene, although the genus Puffinus (which includes today's Manx shearwater and sooty shearwater) might date back to the Oligocene.
The Manx shearwater (Puffinus puffinus) is a medium-sized shearwater in the seabird family Procellariidae.

Puffinus

Puffinus tedfordi
Modern genera began their wide radiation in the Miocene, although the genus Puffinus (which includes today's Manx shearwater and sooty shearwater) might date back to the Oligocene.
Puffinus is a genus of seabirds in the order Procellariiformes.

Sooty shearwater

muttonbirdPuffinus griseussooty
Modern genera began their wide radiation in the Miocene, although the genus Puffinus (which includes today's Manx shearwater and sooty shearwater) might date back to the Oligocene.
The sooty shearwater (Ardenna grisea) is a medium-large shearwater in the seabird family Procellariidae.

Plotopteridae

plotopteridplotopteridsancient marine birds
These post-extinction seas were dominated by early Procellariidae, giant penguins and two extinct families, the Pelagornithidae and the Plotopteridae (a group of large seabirds that looked like the penguins).
Plotopteridae is the name of an extinct family of flightless seabirds from the order Suliformes.

Wandering albatross

Diomedea exulanswandering
Species such as the wandering albatross, which forage over huge areas of sea, have a reduced capacity for powered flight and are dependent on a type of gliding called dynamic soaring (where the wind deflected by waves provides lift) as well as slope soaring.
The wandering albatross, snowy albatross, white-winged albatross or goonie (Diomedea exulans) is a large seabird from the family Diomedeidae, which has a circumpolar range in the Southern Ocean.

Tytthostonyx

Tytthostonyx glauconiticus
While Hesperornis is not thought to have left descendants, the earliest modern seabirds also occurred in the Cretaceous, with a species called Tytthostonyx glauconiticus, which seems allied to the Procellariiformes and Pelecaniformes.
Tytthostonyx is a genus of prehistoric seabird.

Ocean

marineoceansmaritime
Seabirds (also known as marine birds) are birds that are adapted to life within the marine environment.
For instance, seabirds are a diverse group of birds that have adapted to a life mainly on the oceans.

Forage fish

prey fishforageforaging
Many seabirds feed on the ocean's surface, as the action of marine currents often concentrates food such as krill, forage fish, squid or other prey items within reach of a dipped head.
Predators include other larger fish, seabirds and marine mammals.

Frigatebird

Fregatidaefrigate birdfrigatebirds
Surface feeding itself can be broken up into two different approaches, surface feeding while flying (for example as practiced by gadfly petrels, frigatebirds and storm petrels), and surface feeding while swimming (examples of which are practiced by fulmars, gulls, many of the shearwaters and gadfly petrels).
Frigatebirds (also listed as "frigate bird", "frigate-bird", "frigate", "frigate-petrel") are a family of seabirds called Fregatidae which are found across all tropical and subtropical oceans.

Gadfly petrel

Pterodromagadfly
Surface feeding itself can be broken up into two different approaches, surface feeding while flying (for example as practiced by gadfly petrels, frigatebirds and storm petrels), and surface feeding while swimming (examples of which are practiced by fulmars, gulls, many of the shearwaters and gadfly petrels).
The gadfly petrels or Pterodroma are a genus of about 35 species of petrels, part of the seabird order Procellariiformes.

Shearwater

shearwatersMutton birdmutton birds
Surface feeding itself can be broken up into two different approaches, surface feeding while flying (for example as practiced by gadfly petrels, frigatebirds and storm petrels), and surface feeding while swimming (examples of which are practiced by fulmars, gulls, many of the shearwaters and gadfly petrels).
Shearwaters are medium-sized long-winged seabirds.

Cormorant

Phalacrocoracidaecormorantsshag
With the exception of the cormorants and some terns, and in common with most other birds, all seabirds have waterproof plumage. Propulsion underwater can be provided by wings (as used by penguins, auks, diving petrels and some other species of petrel) or feet (as used by cormorants, grebes, loons and several types of fish-eating ducks).
Cormorants and shags are medium-to-large seabirds.

Diving petrel

Pelecanoididaediving-petrelPelecanoides
Propulsion underwater can be provided by wings (as used by penguins, auks, diving petrels and some other species of petrel) or feet (as used by cormorants, grebes, loons and several types of fish-eating ducks).
The diving petrels are seabirds in the bird order Procellariiformes.

Razorbill

Alca tordarazorbillsAlca
For example, the razorbill (an Atlantic auk) requires 64% more energy to fly than a petrel of equivalent size.
The razorbill or lesser auk (Alca torda) is a colonial seabird in the monotypic genus Alca of the family Alcidae, the auks.

Bird migration

migratorymigratemigratory birds
Many species are famous for undertaking long annual migrations, crossing the equator or circumnavigating the Earth in some cases.
Seabird migration is similar in pattern to those of the waders and waterfowl.

Albatross

Diomedeidaealbatrossesalbatros
The deepest diving exhibited by shearwaters is found in the short-tailed shearwater, which has been recorded diving below 70 m. Some albatross species are also capable of limited diving, with light-mantled sooty albatrosses holding the record at 12 m. Of all the wing-propelled pursuit divers, the most efficient in the air are the albatrosses, and they are also the poorest divers.
Albatrosses, of the biological family Diomedeidae, are large seabirds related to the procellariids, storm petrels, and diving petrels in the order Procellariiformes (the tubenoses).

Gannet

gannetsMorusMorus sp.
Gannets, boobies, tropicbirds, some terns and brown pelicans all engage in plunge diving, taking fast moving prey by diving into the water from flight.
Gannets are seabirds comprising the genus Morus, in the family Sulidae, closely related to boobies.

Booby

boobiesSulabooby birds
Gannets, boobies, tropicbirds, some terns and brown pelicans all engage in plunge diving, taking fast moving prey by diving into the water from flight.
A booby is a seabird in the genus Sula, part of the Sulidae family.

Great frigatebird

Fregata minorgreatGreater frigatebird
A study of great frigatebirds stealing from masked boobies estimated that the frigatebirds could at most obtain 40% of the food they needed, and on average obtained only 5%.
The great frigatebird (Fregata minor) is a large seabird in the frigatebird family.