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Bird Facts

Feathered, winged, egg-laying, vertebrate animals

  • There are around 10,000 living species of birds.
  • All present species belong to the subclass Neornithes.
  • Size of birds range from 5 cm (2 in) Bee Hummingbird to the 2.75 m (9 ft) Ostrich.
  • Ostrich lays the largest eggs speed (97 kph).
  • Birds have hollow bones which help them fly.
  • Hummingbirds can fly backwards.
  • Around 20% of bird species migrate long distances every year.
  • The first classification of birds was developed by Francis Willughby and John Ray in 1676.
  • The highest bird diversity occurs in tropical regions.
  • The sex of birds is determined by the Z and W sex chromosomes, rather than by the X and Y chromosomes present in mammals.
  • The American Flamingo tuck their head into their back when sleeping.
  • All birds lay amniotic eggs with hard shells made mostly of calcium carbonate.
  • Domesticated birds raised for meat and eggs is called poultry.
  • The nest of an Emu can be up to 1.5 metres wide.
  • A flamingo can eat only when its head is upside down.
  • The longest recorded flight of a chicken is 13 seconds.
  • Owls have tubular shaped eyeballs because of which they cannot move their eyes.
  • A duck's quack doesn't echo anywhere.
  • Birds do not sweat.
  • Emperor penguins are the largest penguin - they are 115cm tall.
  • There are over 350 species of parrots in the world.
  • The first bird domesticated by humans was the goose.
  • A bird's feathers weigh more than its skeleton does.
  • Kiwi birds are blind, so they hunt by smell.
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