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got his M.Sc. Zoology with I Class and I Rank in 1963 from Agra University, Agra; awarded Ph.D. in 1968 from Sri Venkateswara University, Tirupati. He was Post-Doctoral Research Fellow at Creedmoor State Hospital, Queens, New York, USA in 1969 and D.Sc. (IOU,Sri Lanka) in 1997.

He was visiting Professor in Biology, Hofstra University, Hempstead, L.I., New York, U.S.A. (1969) and worked as a postgraduate Lecturer in Zoology from 1970 to 1978, at Utkal University, Bhubaneswar, Orissa. He worled as Senior Professpr, Chairman and Coordinator, Department of Environment Sciences, Andhra University, Visakhapatnam, India and retired in 2001. Now he is a President in Environmental Research Academy, International (Enra).

He had published about 206 Technical and Scientific papers in Indian and International Journals. 33 Ph.D.'s and 12 M.Phil. Degrees were awarded under his able guidance to date. He had successfully completed 14 major research projects sanctioned by UGC, World Bank, CSIR and IUCN, SSC/Crocodile Specialist Group, Geneva and also member of CBSG (IUCN). He is a Hon. Life member in Sea turtle Preservation Society, Florida, USA.

In recognition of his achievements in contempoary research, National Environmental Science Academy, New Delhi awarded him a Best Scientist for the year 1986 and decorated him with a Gold Medal and in 1991, the Andhra University recognized the research talents of Prof. Rao and awarded him the Best Research Scientist and ISEAS, Bangalore with Gold Medal in 1997, American Biographical Research Inc., USA has nominated him as International Distinguished Leader in 1996, 1997. His name was placed in Asia's Who's Who, Man of Achievement, 1996, 1997, 2000. He was awarded a gold medal for best Zoologist by ZSI in 2004 and AJRA in 2009. He is a Peer committee member in NAAC.

Dr. Rao was a working group member in Eastern and Western Ghats Research projects, Ministry of Environment & Forests, Govt, New Delhi. He is a consultant for Environment Impact Assessment, NTPC, Vamsadhara, YRP, Visakhapatnam Port Trust, NFCL, GFCL, Spectrum, Kakinada Sea Ports Ltd., etc.

For his research studies especially in Ecology, Wildlife biology and for participating in seminars and symposia, he had visited USA, UK, Australia, Sinapore, Malaysia, Austria, Italy, France, Greece, Canada, Switzerland, Iran, Germany and Sri Lanka.