The American Bulldog is a stocky, muscular breed with a distinctive broad head. Known for its strength and agility, it has a short coat and a powerful build. It is loyal, protective, and often used in farm work. This breed thrives in active environments and requires regular exercise.

The American Bulldog is not a wild animal species; rather, it is a domesticated dog breed originally bred in the United States. As such, it does not have a 'native' region in the same way that wild species do, but it is historically associated with the southeastern United States, particularly in rural areas where it was used for farm work and guarding properties.

As a domesticated breed, American Bulldogs do not have a natural habitat in the wild. They are adaptable to a variety of living conditions but thrive best in environments where they have space to exercise, such as suburban or rural settings. They require regular physical activity and mental stimulation.

The American Bulldog's ecological niche is primarily as a companion and working dog. Historically, they were used for farm tasks, including herding cattle and as guard dogs. Today, they often serve as family pets, protectors, and in some cases, as working dogs in various capacities.