Bee consistency. Some solitary bees have advanced types of pollen-carrying structures on their bodies. A very few species of solitary bees are being cultured for commercial pollination. Most of these species belong to a distinct set of genera which are commonly known by their nesting behavior or preferences, namely: carpenter bees, sweat bees, mason bees, plasterer bees, squash bees, dwarf carpenter bees, leafcutter bees, alkali bees and digger bees. Most solitary bees nest in the ground in a variety of soil textures and conditions while others create nests in hollow reeds or twigs, holes in wood. The female typically creates a
Sessa Orchid Sanctuary new and endemic species. Sub-tropical types include the genera "Dendrobium", "Bulbophyllum", "Coelogyne", "Eria", "Phaius" and "Liparis". The sanctuary is unique in having 7 endemic species of saprotrophic orchids. 12 rare species of different families were found in one study of the area. The Government of Arunachal Pradesh in the late 1970s created a post of orchidologist in the Forest Department and in 1989 established the Orchid Research and Development Centre (ORDC) at Tipi, and the Sessa Orchid Sanctuary 20 km away. The ORDC is actively engaged in exploration and collection of orchid species, cultivation in orchidaria and gardens for their