Nest build fresh nests daily out of leaves and other vegetation in which they sleep at night. They sometimes also build nests during the day for resting in. The smaller species of gorilla build their nests in trees, while the larger are confined to the ground. Nests of the western gorilla, the largest species, measure about in diameter. Some species of frog build nests ranging from simple to modest complexity. Many stream-dwelling frogs lay their eggs in a gelatinous mass which they attach to underwater vegetation. The jelly structure prevents the eggs from washing away. Fish engage in nest building activities
Edible bird's nest billion baht per year. The industry globally is an estimated . Hong Kong and the United States are the largest importers of nests. In Hong Kong, a bowl of bird's nest soup would cost to . A kilogram of white bird's nest can fetch up to , and a kilogram of red nests up to . The white nests can be treated with red pigment to defraud buyers, but methods have been developed to determine an adulterated nest. Natural red cave nests are often found in limestone caves in Pak Phayun District, Thailand. The high returns and growing demand has