Seabird
Seabird
Seabird (pronunciation: /ˈsiːbɜːrd/) is a type of bird that has adapted to life within the marine environment.
Etymology
The term "seabird" is derived from the Old English words "sǣ" meaning "sea" and "brid" meaning "bird".
Definition
Seabirds are birds that are adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding niches have resulted in similar adaptations. The first seabirds evolved in the Cretaceous period, and modern seabird families emerged in the Paleogene.
Characteristics
In general, seabirds live longer, breed later and have fewer young than terrestrial birds do, but they invest a great deal of time in their young. Most species nest in colonies, which can vary in size from a few dozen birds to millions. Many species are famous for undertaking long annual migrations, crossing the equator or circumnavigating the Earth in some cases.
Types of Seabirds
There are various types of seabirds, including albatross, penguin, petrel, auk, gull, tern, and skua. Each of these birds have unique characteristics and adaptations that allow them to survive in marine environments.
Related Terms
- Albatross: A large seabird known for its ability to fly long distances across oceans.
- Penguin: A flightless seabird known for its distinctive black and white colouring.
- Petrel: A type of seabird that includes many species, most of which are pelagic.
- Auk: A type of seabird that includes puffins and guillemots.
- Gull: A medium to large seabird, many species of which are associated with coastal or inland areas.
- Tern: A type of seabird known for its slender body and long, forked tail.
- Skua: A type of seabird known for its aggressive behaviour, especially towards other birds.
External links
- Medical encyclopedia article on Seabird
- Wikipedia's article - Seabird
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