(a) The species which no longer exist anywhere on the earth are called extinct species. The extinct species may be of animals or plants.A type of animal which no longer exist on earth is called an extinct animals.It means that this animal has no living member on the earth.
According to noted ecologist E.O.Wilson every year nearly 10,000 species or 27 species per day become extinct throughout the world.
Few animals extinct are passenger pigeon,dodo,western black rhinosceros,quagga, Tasmanian tiger.
(b) Species which are endangered and have to be protected. Otherwise they are likely to become extinct (disappear from earth for ever) in the near future. Endangered Species. W.W.F.(World Wildlife Federation) or the I.U.W.C (International Union for Wildlife Conservation ) published a book containing the details of endangered and threatened species of Flora and Fauna called as RED DATA BOOK or RED LIST BOOK. Examples Lion, red fox, vulture, wild cat , black spider monkey,loris,white spotted chetal deer , few plant species are rauvolfia serpentine ,Cycas, Nepehthes.
(c) Plants or animal species found restricted to a particular area of a country are called Endemic Species. India shows a good number of endemic species. About 62% of worlds amphibians and 50% of lizards are endemic to Western Ghats of India.
Asiatic lion (gir forest), sangai deer (Loktak lake), lion tailed macaque (western ghats),Kashmir stag (Kashmir Valley).
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