Birds are feathered winged two-legged, warm-blooded egg-laying vertebrates. 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. Extant birds have more or less developed wings; the most recent species without wings was the moa which is generally considered to have become extinct in the 16th century. Wings are evolved forelimbs and most bird species can fly. Flightless birds include ratites, penguins and diverse endemic island species. Some species of birds particularly penguins and members of the Anatidae family are adapted to swim. Birds also have digestive and respiratory systems that are uniquely adapted for flight. Some birds especially corvids and parrots are among the most intelligent animal species; several bird species make and use tools and many social species culturally transmit knowledge across generations.
Many species annually migrate great distances and many more perform shorter irregular movements. Birds are social, communicating with visual signals calls and songs and participating in such social behaviours as cooperative breeding and hunting, flocking and mobbing of predators. The vast majority of bird species are socially monogamous usually for one breeding season at a time, sometimes for years but rarely for life. Other species have polygynous many females or rarely polyandrous many males breeding systems. Eggs are usually laid in a nest and incubated by the parents. Most birds have an extended period of parental care after hatching.
bird wallpapers for your phone or tablet!
- This feature can tap on the screen and make the image immediately.
- It has support for landscape mode and portrait mode switching screen.
- Beautiful background free and fun are waiting for you!
Instructions to install:
Home - Menu -> Wallpapers.
Movements and flashing light keeps changing with time.
- You can choose from several different styles.
- HD Graphics and Open GL
- Battery usage optimization.
- Compatible with 99% of mobile phone accessories.
- bird pictures fully supports landscape and look amazing on tablet devices.
Please contact us if you have any problems with our application.
* Android is a trademark of Google.
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