 A comparison of the lichen flora of the garden Lal Bagh in Bangalore has revealed that 18 of the 22 species noted in 1980 were no longer present in 1997.Pollution in rivers like Kabini, Kaveri and Ghataprabha has caused sharp reduction in populations of bird species, including beneficial insectivorous birds like drongos, as well as honeybees.Introduction of new species into a habitat has caused serious consequences to the existing species of flora and fauna.