Biology

Amazing general facts about Birds

About 9000 species of birds are present all over the world
Birds are the Best fliers.
There are about 100 billion birds in the world.
The only one group of animals having feathers is birds (Aves).
Feathers of most of the birds are heavier than their bones.

The lifespan of 75 % of wild birds is 6 months.
Male birds are more attractive and handsome than female birds. It helps to attract female.
Body temperature of Owl, Duck, Eagle etc is 104-106^o F whereas of Pigeon & sparrow: 107-109^o F
Birds do not sweat, as they do not have sweat glands. Skin is dry without glands except the oil gland at the base of the tail.
Birds have 100 times better night vision than that of human.
Birds have no teeth. Food is grinded in the gizzard of stomach
Birds have four-chambered heart as in mammals.
Birds have no urinary bladder. It reduces the body weight for flying.
Birds have only a single ovary. It also reduces body weight for effective flying.
There are some additional air sacs attached to the lungs of the birds. So they can receive maximum oxygen during breathing.
Birds save energy by flying in a "V" formation.

A bird requires more food in proportion to its size than a baby or a cat. Many birds can eat twice their body weight daily.
Birds need gravity to swallow so if they are sent to space they will die soon.
About 3 new species of bird are discovered each year.
Most birds will incubate nearly any round object. Similarly, ground-nesting birds tend to roll round objects into their nests.
A flute made of bone is the oldest playable musical instrument in the world. It?s a flute carved from a bird?s wing bone more than 9,000 years ago. The flute was discovered with other flutes at an ancient burial site in China.
Bird droppings are the chief export of Nauru, an island nation in the Western Pacific.
Birds can recognize different colours. Red, deep pink, yellow colours are their favourite colours.
Some male songbirds sing more than 2000 times each day.
Sometimes birds show anger towards humans by taking out its feelings on other birds nearby, because they are too afraid to attack humans.

Over 10,000 birds a year die from smashing into windows.
There are an estimated 2,500 collisions between birds and planes each year in the US.
Birds do not sleep in their nests. They may occasionally nap in them, but they actually sleep in other places.
In order to scare away predators, Giant petrels, a type of seabird, throw up all over the intruder.
In the middle Ages, peacocks and swans were sometimes served at Christmas dinners.
In USA, birds and planes collided more than 22,000 times between the years of 1990 and 1998.

Most of the flightless birds are seen in Australia and New Zealand.
Some species of birds especially the flightless birds only have a lower eyelid.
Some birds have been known to put ants into their feathers because the ants squirt formic acid, which kills parasites.
The brain of animals like birds, cat, dog etc contains a special type of cells called ?magnetites? which interact with earth?s magnetic field thereby recognize north and south. Thus such animals can come back to their own place.
The dodo, extinct less than 100 years after being discovered by the Dutch in 1598, was not a prolific species. The female laid just one egg a year The female knot-tying weaver bird will refuse to mate with a male who has built a shoddy nest. If spurned, the male must take the nest apart and completely rebuild it in order to win the affections of the female.
There are an estimated 2,500 collisions between birds and planes each year in the US.
Fastest known flying birds: White throated spine tail swift: 170 kmph Common Eiders (Coastal ducks): 75 kmph Peregrine falcons: 60 kmph Buzzards: 110-130 kmph Swallows: 50 kmph (160 kmph during migration).
Heaviest flying bird: African Kori bustard. Lightest: Bee Humming bird (5.7 cm; 1.6 gm)
The oldest bird on record was Cocky, a cockatoo, who died in the London Zoo at the age of 82.
Keenest vision: Birds.
Longest feather: Tail feather (6 feet) of Argus pheasant (male)

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