Tropical tassur silkmoth Antheraea mylitta Drury is exploited in country for commercial silk production and improved by means of optimial utilisation of the ecosystem. The Modal unique Eco race which is found in Similipal Biosphere Reserve (SBR) of Mayurbhanj district. It predominantly feeds on sal producing very high quality of cocoons rich in silk content. However this has a strong impact on the local economy of the immediate community. So there is a urgent need of studying the behavioural pattern of drury in the SBR. Here in this study an attempt has been made in this context. However there is a great variation in the genotypes of Modal in the varied ecological conditions of Similpal forest. However tussar silk has been fascinating the human society since time immemorial. Silk is the most elegant textiles in the world with unparalleled grandeur, natural shine, inherent affinity for dyes and high absorbance. The demand for it is growing constantly at the present time for its light weight, soft in touch and has high durability besides organic in nature. However Tussar silk is very much associated with Indian tradition and culture. It always enriches sacredness, religious faith and it promotes the progress of science, technology and economics. So, it is treasured like gold and offered as gift by each and every nation of all over the globe. The sector of sericulture has been emerged to explore more in this field to boost the contribution for mankind. It includes both agriculture and industrial activities. Sericulture involves the raising of food plants for silk moth rearing for production of cocoons, reeling and spinning of cocoon for products of yarn, weaving of silk yarn for production of fabric etc. The genus Antheraea is very important from economic point of view since this produce Tasar and Muga silks and has a direct bearing on sustainable resource management and ecosystem development. In this study an attempt has been made to study the behavior of mylitta Drury.