Master of Science, Presidency College, Madras, 1971. Doctor of Philosophy, Loyola University and University Madras, 1981. Doctor of Science, University Madras, 2004.
Demonstrator in botany Loyola College, 1971-1977, assistant professor, 1977-1987, professor, since 1987, assistant director research Entomology Research Institute, since 1985. Visiting professor Australian Academy and Sciences. Committee member Environmental Education Center, Madras, since 1987.
Adviser World Wildlife Fund, Madras, since 1989. Member senate St. Therasa's College, Eluru, Andra Pradesh, India, since 1989.
Fellow Linnean Society London. Member Ecological Society American.
Married Lata Vydeswaran, January 26, 1983. 1 child, Ramya Raman.