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All About Birds: Eagle (The Cornell Lab of Ornithology)
Tree of Life
Plant Flower, Tree
Invertebrate 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
These are organized by a classification scheme developed exclusively for Cosma. More…
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 bird feather patterns form
on February 21, 2019 at 7:15 pm
According to a new study, the precise patterning of bird feathers relies on signaling through ectodysplasin (EDA) and its receptor EDAR -- the same signaling pathway known to be crucial for the formation of hair follicles, teeth and scales in fish, lizards and mammals. […]
Recent drought may provide a glimpse of the...
on February 21, 2019 at 7:13 pm
To better understand the effects of climate change on the bird community in the Sierra Nevada region, researchers examined the impacts to birds from a recent extreme drought (2013-2016). The drought resulted in the widespread death of pine trees due to attacks by bark beetles, potentially impacting wildlife habitat. While the results were varied, researchers found that many bird species responded positively to the climate conditions associated with the drought, potentially offsetting the […]
Good news: Habitats worthy of protection in...
on February 21, 2019 at 5:29 pm
The world's largest coordinated network of protected areas is not located at the South Pole or in Australia, Africa, Asia or on the American continents -- but in Europe. An international team of researchers has examined how effectively Natura 2000 protects listed habitat types in Germany. The result: although the existing network includes sites of special interest, not all habitat types are represented proportionally. […]
How to save a seabird
on February 21, 2019 at 4:04 pm
A new study outlines more than a decade of success in reducing seabird bycatch in Alaska's longline fisheries, and where there's still room for improvement. […]
Origins of giant extinct New Zealand bird traced...
on February 21, 2019 at 4:03 pm
Scientists have revealed the African origins of New Zealand's most mysterious giant flightless bird -- the now extinct adzebill -- showing that some of its closest living relatives are the pint-sized flufftails from Madagascar and Africa. […]
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Study of human impact on food webs and ecosystems...
on February 22, 2019 at 3:20 pm
When the Australian government relocated Martu hunter-gatherers from their Western Australia lands in the 1960s, no one could have predicted the massive impact their absence would have on the desert ecosystem. A new study led by Stefani Crabtree, a Santa Fe Institute Visiting Researcher (Center for Research and Interdisciplinarity, Crow Canyon Archaeological Center), and co-authored by Rebecca Bliege Bird and Douglas W. Bird of the Pennsylvania State University, shows the critical role humans […]
Being a dad is hard when you're a plainfin...
on February 22, 2019 at 2:40 pm
Each spring, male plainfin midshipman fish (Porichthys notatus) —a kind of toadfish —emerge from the depths of the Pacific Ocean to breed on the beach. They overwhelm the beach at low tide, wedge themselves beneath rocks and excavate a nest in the rocks and sand. When their work is completed, the bachelors settle down and hum to attract mates. […]
Sexual selection in action: Birds that attract...
on February 22, 2019 at 2:00 pm
How do individuals choose their mates? Why are some more successful at attracting mates than others? […]
Climate change may affect ecological interactions...
on February 22, 2019 at 12:09 pm
With herbivores, omnivores, carnivores, insectivores, frugivores, scavengers and decomposers, Earth's ecosystems function within a vast web of interactions among plants, animals, insects, fungi and microorganisms. A fundamental part of this web resides in the equilibrium of the food chain that links predators to herbivores and regulates plant production on our planet. […]
How bird feather patterns form
on February 21, 2019 at 7:00 pm
Feathers evolved in dinosaurs and are a key characteristic of birds today. They are arranged in a precise hexagonal pattern in a bird's skin, but it has been unclear how this happens. According to a new study published February 21 in the open-access journal PLOS Biology, led by Dr. William Ho and Denis Headon of the University of Edinburgh, and collaborative colleagues, the patterning of bird feathers relies on signaling through ectodysplasin (EDA) and its receptor EDAR—the same signaling […]