Urbanization causes wholesale transformation of the local environment, affecting it at a fundamental level by altering habitat, climate, hydrology, and primary production. Especially tree species richness in an area facilitates the opportunity for the other living organism to develop. Because trees have very long life span, good crown cover to nest, breed and fruits to eat etc. We have studied tree species diversity in four campuses of Roever Educational Institutions. In that we have estimated richness of trees, dominant trees in each campuses, estimated Tree Diversity Index using Simpson's Diversity Index. We found that Thanthai Hans Roever College has highest tree species diversity with the D value of 0.057809222. Among the all species coconut dominate all the species in richness followed by Drumstick trees.

House sparrow is one of the endangering species of recent times. It has various roles to play in the urban environment and also helps to keep the ecological balance. The reasons for its declining are many such as lack of nesting places, lack of food and unwillingness of common man to coexist with it etc. On the whole it is an alarm bell to all to take necessary steps to conserve the small bird. In our college we have taken an initiative step by setting Nest pot in various locations where sparrows noticed and places where chance nesting is positive. We have installed more than 100 nest pot in and around found campuses of the Rover Education Institutions. And we have spread some grains purchased from the markets as a source of food for the sparrows. Our Agricultural department also requested to use organic pesticide rather than broad spectrum insecticides. We see movement of House sparrow here and there near the nest pots.