Biju has published about 200 scientific illustrations of plants and amphibians, including illustrations/artwork in books and scientific journals, such as Nature, Science, PNAS, Proceedings of the Royal Society London, Zoological Journal of Linnean Society, Zootaxa, Journal of Herpetology, Copeia, PLoS ONE, PeerJ, etc (amphibians); Taxon, Blumea, Kew Bulletin, Nordic Journal of Botany, Novon, Rheedea, etc (plants).