Bloodhounds are mostly used by the United States. Usually, dogs are looking for missing people, as well as help to find victims of natural and man-made disasters. Anatomical features help the hounds in this. For example, a dog’s long, drooping ears work like an impromptu fan, capturing the desired scent and bringing it to the nose, while blocking and cutting off distracting “aromas” from the outside. The folds on the forehead of the Bloodhound create a small hood that narrows the field of view during the search. This helps the hound to concentrate on work and not be distracted by what is happening around.