“As part of World Forest day and sparrow day, we are reaching out to students’ community on the need to conserve the ecosystem. As on date almost all the flagship species ranging from elephant to sparrow are facing habitat destruction,” said K Brinda, biologist, Biodiversity Conservation Foundation Trichy. Currently the census works are underway in Trichy and the details of the nesting birds are added to the government database, the biologist said. Degradation of forests occur due to displacement of wildlife and elephant is a classic example. An elephant can raise 20,000 saplings annually through seed dispersion. In case of Chennai, the spotted deer are facing habitat loss and extinction due to biotic pressures like construction and stray dog menace. IIT Madras campus is an example for such deer deaths due to stray dog attacks, Brinda noted.