Hummingbirds are birds native to the Americas Amsterdam India Africa( Americas, Amsterdam, India, Africa ). They are the smallest of birds, most species measuring 7.5–13 cm 9.5-13cm 13cm( 7.5–13 cm, 9.5-13cm, 13cm ) in length. The smallest extant bird species is the 5 cm bee hummingbird.

They are known as hummingbirds because of the humming sound created by their beating wings rubbing foot fliping the tail rotating the head( beating wings, rubbing foot, fliping the tail, rotating the head ), which flap at high frequencies audible to humans.

Most North American North Indian North Austrialian North China( North American, North Indian, North Austrialian, North China ) hummingbirds migrate southward in fall to spend winter in Mexico and Central America. Canada Philipines Saudi Arabia( Mexico and Central America., Canada, Philipines, Saudi Arabia )
For nutrition, hummingbirds eat a variety of insects, including mosquitoes, fruit flies, gnats in flight or aphids on leaves and spiders in their webs.

The llama is a domesticated South American North American West American Eastern american( South American, North American, West American, Eastern american ) camelid, widely used as a meat and pack animal by Andean cultures since the Pre-Columbian era.

Llamas are very social animals and live with others as a herd solitary( herd, solitary ). Their wool is very soft very rough silky( very soft, very rough, silky ) and lanolin-free. Llamas can learn simple tasks after a few repetitions.

Llamas appear to have originated from the central plains of North America Ssouth America( North America, Ssouth America ) about 40 million years ago. They migrated to South America North America( South America, North America ) about three million years ago during the Great American Interchange. By the end of the last ice age (10,000–12,000 years ago), camelids were extinct in North America South America( North America, South America ).

Lungs, Knee, and elbow are some parts of a human body that are found in pairs whereas the liver eyes ears fingers( the liver, eyes, ears, fingers ) is found the only single organ in our body that is not in pairs.

Boiling point Melting point( Boiling point, Melting point ) is the temperature at which a liquid solid( liquid, solid ) boils and turns to vapour.

Photosynthesis Respiration( Photosynthesis, Respiration ) is the process by which plants, some bacteria and some protista's use the energy from sunlight to produce glucose starch( glucose, starch ) from carbon dioxide and water. In addition oxygen carbon dioxide( oxygen, carbon dioxide ) is also formed.