The term 'BIRD's Habitat' can be summarized by the four-letter word 'NEST'. A BIRD's NEST is a structure built by a BIRD to provide a safe place for them to lay their eggs and raise their young. It is usually made of twigs, grass, mud, and other materials that are found in the BIRD's environment. The NEST is typically located in a tree, bush, or other elevated area, and is designed to protect the eggs and chicks from predators.