Nepal's unique geographical location has significant altitude differences and associated ecological climatic conditions, resulting in a unique and rich biodiversity. In addition, the country's geographical location is located in two major biogeographical regions - the Indomalaya tropical zone and the Palearctic temperate zone - making Nepal home to species from both regions. In Nepal, 118 different ecosystems were identified, including 112 forest ecosystems, 4 crop ecosystems, 1 aquatic ecosystem, and 1 glacial/snow/rock ecosystem. In terms of the richness of the world's biodiversity, Nepal ranks 25th and 11th in Asia. Nepal accounts for about 0.1% of the total area of the Earth, but it accounts for 3.2% and 1.1% of the known flora and fauna.
According to reports, Nepal has about 5.2% of world mammals, 9.5% of birds, 5.1% of gymnosperms, and 8.2% of bryophytes. According to reports, there are 284 flowering plants, 160 animal species and 14 species of crustal animals in Nepal. Different climatic and topographical conditions also contribute to the maximum diversity of crops and their associated wild species and their animal species. Biodiversity is closely related to the livelihoods of most Nepali people and economic prosperity. Biodiversity covers almost every aspect of Nepal's life, including agricultural productivity, food security, building materials, health, nutrition, indigenous knowledge, gender equality, culture, climate, resources water and social aesthetic value. The Nepalese economy depends a lot on the use of natural resources. Income from biodiversity is an important source in the country.