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
To Build a Fire build the idea that the man believes nature is intended to serve him. The man's interactions in this relationship is how the reader discovers the man's personality and character. By including the dog, the author makes the man less likable. London even describes the dog as his "toil-slave". "Man vs. Nature" is one of the themes present in this short story. The protagonist decides to face the brutal cold temperatures of the Yukon Territory, despite being warned by an older man. The short story depicts the protagonist's battle of life and death while highlighting the importance of the fire. One