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He is the owner of Efloraofindia,largest Google e-group in this field and also the largest nature related group in India devoted to creating awareness, helping in identification etc. along with discussion & documentation of Indian Flora. More than 11,000 species' pages of seed plants, alphabetically sized- Seed plants etc., ferns, fungi & others are available with details for those species which have already been discussed in effloraofindia e-group. It has the largest database on net on Indian Flora.He is also the author of 'A Photo guide to the birds of Kolkata & Common birds of India'.