The chicken is a fowl. The definition of a fowl is a bird used for food. A hen is an example of fowl. Chicken is an example of fowl. fowl. the duck, goose, turkey, etc. a full-grown chicken, as distinguished from a springer, etc. fowl.
Data collection and search-and-rescue missions are faster and more efficient with a team of drones to pool data and provide redundancy in case some machines fail. But the use of more vehicles also adds complexity. Drones working together have to be able to communicate with one another and make collective decisions.
Quadcopter unmanned aerial vehicles are used for surveillance and reconnaissance by military and law enforcement agencies, as well as search and rescue missions in urban environments. One such example is the Aeryon Scout, created by Canadian company Aeryon Labs, which is a small UAV that can quietly hover in place and use a camera to observe people and objects on the ground.