In our surrounding large number of species have been facing serious problem due to disturbance on their habitat. While these species play key role in environment but lack of adequate study on such species made them a vulnerable species. Due to puny information on their ecology, they are not getting priorities from conservationist that’s why, they have to face myriad number of threats. In this context, this book helps to provide field based knowledge for the quantification of population, habitat and threats of a wild species. Similarly, this book explains a process to link remote sensing, GIS and people's perception in wildlife research. The main aim of this book is to explore the detail ecology, population, habitat and conservation issue of Lesser Adjutant Stork; a vulnerable species identified by IUCN in eastern lowlands of Nepal.