bird : any of a class (Aves) of warm-blooded vertebrates distinguished by having the body more or less completely covered with feathers and the forelimbs modified as wings — Webster
Birds, also known as Aves, are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the 5 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich. They rank as the world’s most numerically-successful class of tetrapods, with approximately ten thousand living species, more than half of these being passerines, sometimes known as perching birds. Birds have wings which are more or less developed depending on the species; the only known groups without wings are the extinct moa and elephant birds. Wings, which evolved from forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in flightless birds, including ratites, penguins, and diverse endemic island species of birds. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming. — Wikipedia
Ornithology is a branch of zoology that concerns the study of birds. Several aspects of ornithology differ from related disciplines, due partly to the high visibility and the aesthetic appeal of birds. Most marked among these is the extent of studies undertaken by amateurs working within the parameters of strict scientific methodology.
The science of ornithology has a long history and studies on birds have helped develop several key concepts in evolution, behavior and ecology such as the definition of species, the process of speciation, instinct, learning, ecological niches, guilds, island biogeography, phylogeography, and conservation. While early ornithology was principally concerned with descriptions and distributions of species, ornithologists today seek answers to very specific questions, often using birds as models to test hypotheses or predictions based on theories. — Wikipedia
Birds News -- ScienceDaily Bird news and research. From chickens to birds of prey, wing design to migration, read all the latest news on birds.
- How are birdsongs composed? Listening to the...on October 1, 2022 at 2:43 pm
An international collaboration between musicians and birdsong scientists has found that in the Australian pied butcherbird songs surveyed, the order of song elements is strongly related to rhythmical timing.
- Less bird diversity in city forestson September 29, 2022 at 5:26 pm
A new study shows that cities negatively affect the diversity of birds. There are significantly fewer bird species in urban forests compared with forests in the countryside -- even if the forest areas are of the same quality.
- Shaking the dinosaur family tree: How did...on September 22, 2022 at 2:31 pm
Researchers have conducted a new analysis of the origins of 'bird-hipped' dinosaurs -- the group which includes iconic species such as Triceratops -- and found that they likely evolved from a group of animals known as silesaurs, which were first identified two decades ago.
- Rising sea temperatures threaten Atlantic...on September 21, 2022 at 2:47 pm
The impact of the rise in sea temperatures predicted by the Intergovernmental Panel on Climate Change (IPCC) could affect the survival of the North Atlantic populations of Bulwer's petrel in the Azores, Canary Islands and Cape Verde, according to a new study.
- Drumming in woodpeckers is neurologically similar...on September 20, 2022 at 6:54 pm
Researchers have found regions in the woodpecker forebrain that show characteristics that until now have only been associated with vocal learning in animals and language in humans. The study shows that instead of being related to vocalization, activity in these brain regions is related to the characteristic tree drumming that gives woodpeckers their name.
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- Bird flu strikes S.Africa's endangered penguinson October 3, 2022 at 6:42 pm
Close to thirty African penguins have died due to avian flu since mid-August at Boulders beach near Cape Town, a crucial breeding site in South Africa.
- Do multimillion-dollar dinosaur auctions erode...on October 3, 2022 at 3:50 pm
Dinosaurs are in the news these days, but it's not just for groundbreaking discoveries.
- What is a wetland? An ecologist explainson October 3, 2022 at 3:30 pm
Wetlands are areas of land that are covered by water, or have flooded or waterlogged soils. They can have water on them either permanently or for just part of the year.
- Investigating the impact of new energy efficient...on October 3, 2022 at 3:27 pm
New energy efficient streetlights are playing a major role in influencing insect behavior, says NIWA.
- What caused the holes in SUE the T. rex's jaw?...on September 30, 2022 at 5:04 pm
SUE the T. rex is one of the most complete, best-preserved Tyrannosaurus rex specimens ever found. That level of preservation helps reveal details about SUE's life. For instance, SUE lived to a ripe old age of about thirty-three, and in those years, suffered their fair share of injuries. SUE's most mysterious ailment might be the holes in their jawbone.
Here are links to pages about closely related subjects.
Life Cell, Gene, Tree of Life
Plant Flower, Tree
Invertebrate Cuttlefish, Octopus, Ant, Bee, Butterfly, Spider, Lobster
Vertebrate Fish, Seahorse, Ray, Shark, Frog, Turtle, Tortoise, Dinosaur
Bird, Ostrich, Owl, Crow, Parrot
Mammal Bat, Rabbit, Giraffe, Camel, Horse, Elephant, Mammoth
Whale, Dolphin, Walrus, Seal, Polar Bear, Bear, Cat, Tiger, Lion, Dog, Wolf
Monkey, Chimpanzee, Human