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In the world today, there are roughly 8,600 species of birds, and about 100 billion birds in the world. Birds have an extraordinarily sleek body frame, and their bodies are sheltered by feathers. There are many birds that have very colorful feathers, while others are barely even noticeable to the naked eye due to their plain and... more »
Baby birds are delicate creatures. It's difficult to refrain from taking in a baby bird that has fallen from its nest. Although it's possible to raise baby birds in captivity, it significantly decreases the bird's chances for survival. There are two types of baby birds you might find on the ground: nestlings and fledglings. It's... more »
While birds are a welcome addition to many gardens – they eat the bugs that might damage plants, not to mention add pretty sights and sounds to the landscape – they can also be a nuisance. Birds can introduce weeds in the garden by way of transporting bird seed and plant seeds around the yard. They can also damage crops... more »
A bird's form of being pregnant is to lay eggs. Birds don't carry babies to full term, but instead lay eggs and sit on them until the babies hatch. The organs that are necessary for a bird to become pregnant, or lay eggs in this case, are the ovaries in females and testes in males. Most female birds actually only have a left ovary,... more »
Watching birds can be a relaxing pastime. Attracting and feeding birds is easy and is something that can be done in any outdoor space. more »
Unlike us people, birds don’t have the luxury of purchasing the home of their...
When it comes to feeding your pet bird, it isn't quite as simple as opening a box of birdseed....
Pet birds are lovely, charming companions, but they do require a great deal of care in order to...
An aviary, or flight cage, is an oversized bird cage that allows birds to fly and interact...
Over 90 percent of birds are considered monogomous. Most birds keep the same mate for the entire mating season and some stay paired for their... more »
Although almost all breeds of birds are able to communicate through vocalizations, only certain breeds are able to communicate by mimicking human... more »
It may seem like to birds of the same species will naturally enjoy the company of one another; however, you should never introduce two birds by... more »
Breeding birds is a huge responsibility. Unless you are well versed on the needs of baby birds and their parents, you shouldn't attempt to breed... more »
Learning to care for your pet birds is essential to ensure a long and healthy life. Aside from their basic needs, birds also require a number of... more »
|image Petroica boodang Meehan Range 1 crop.jpg
|image_width 240px
|image_caption domain [[Eukaryota
|regnum subregnum [[Eumetazoa
|superphylum phylum [[Chordata
|subphylum infraphylum [[Gnathostomata
|superclassis classis_authority [[Carolus Linnaeus|Linnaeus, 1758
|subdivision_ranks Subclasses & orders
|subdivision
* About two dozen modern orders and several extinct orders and subclasses
}}
Birds (class Aves) are winged, bipedal, endothermic (warm-blooded), vertebrate animals that lay eggs. There are around 10,000 living species, making them the most numerous tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Birds range in size from the Bee Hummingbird to the Ostrich. The fossil record indicates that birds evolved from theropod dinosaurs during the Jurassic period, around 150–200 Ma (million years ago), and the earliest known bird is the Late Jurassic Archaeopteryx, c 150–145 Ma. Most paleontologists regard birds as the only clade of dinosaurs to have survived the Cretaceous–Tertiary extinction event approximately 65.5 Ma.
Modern birds are characterised by feathers, a beak with no teeth, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton. All birds have forelimbs modified as wings and most can fly, with some exceptions including ratites, penguins, and a number of diverse endemic island species. Birds also have unique digestive and respiratory systems that are highly adapted for flight. Some birds, especially corvids and parrots, are among the most intelligent animal species; a number of bird species have been observed manufacturing and using tools, and many social species exhibit cultural transmission of knowledge across generations.
Many species undertake long distance annual migrations, and many more perform shorter irregular movements. Birds are social; they communicate using read more at » http://en.wikipedia.org/wiki/Bird
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