Birds Name Quiz: A to Z

鳥名測驗：A到Z

Birds Name Quiz: A to Z

Key Features of this APP:

• At practice mode you can see the explanation describing the correct answer.

• Real exam style full mock exam with timed interface

• Ability to create own quick mock by choosing the number of MCQ’s.

• You can create your profile and see your result history with just one click.

• This app contains large number of question set that covers all syllabus area.

birds alarm clock

a bird

a gri birds

birds birds

b battle birds

birds color by number

birds chirping

angry birds c

birds dragons

birds dream blast

angry birds d

Birds, also known as Aves or avian dinosaurs, 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 passerine, or "perching" birds. Birds have wings whose development varies according to 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 some 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.

Many species of birds are economically important as food for human consumption and raw material in manufacturing, with domesticated and undomesticated birds (poultry and game) being important sources of eggs, meat, and feathers. Songbirds, parrots, and other species are popular as pets. Guano (bird excrement) is harvested for use as a fertiliser. Birds figure throughout human culture. About 120 to 130 species have become extinct due to human activity since the 17th century, and hundreds more before then. Human activity threatens about 1,200 bird species with extinction, though efforts are underway to protect them.[3] Recreational birdwatching is an important part of the ecotourism industry.