Fifteen bird species of India included in Red data book.Biodiversity of our planet Earth is facing serious problems since several species of animals and plants are disappearing from its eco system. The latest Red Data Book entries of International Union for conservation of Nature (IUCN) show that fifteen species of birds are 'critically endangered'. Another three are coming in the 'near threatened' and 'vulnerable' category. Migratory birds are coming in the list of 'critically endangered'. These birds are generally seen in wet land areas. Certain species of vultures are also recorded in the book.
Different living organisms vanish from the surface of earth because the conditions of land around it become unfit for their living. Very often the loss of food chain is a major reason for such situations. If we look around we can see examples of these changes. Caterpillars or such smaller varieties of flies are slowly vanishing from certain localities. Use of pesticides is a major cause of this.