The American Cocker Spaniel is a medium-sized dog known for its silky, wavy coat and long, floppy ears. It typically exhibits a friendly and gentle temperament, making it a popular family pet. Cocker Spaniels are energetic and require regular exercise. They are adept hunters, originally bred for bird hunting, and have an excellent sense of smell.

American Cocker Spaniels are not a wild animal species with a native region in the traditional sense. They are a domesticated breed developed in the United States from English Cocker Spaniels. Thus, their 'native region' in a historical or breeding sense is North America, specifically the United States.

As a domesticated dog breed, American Cocker Spaniels do not have a natural wild habitat. They are typically found living in human environments, including urban, suburban, and rural settings. They thrive in homes where they have access to both indoor comfort and outdoor play areas.

The ecological niche of the American Cocker Spaniel is largely defined by its role as a companion animal. They are known for their friendly and sociable nature, making them well-suited to family life. Historically, they were bred as hunting dogs, particularly for retrieving game birds, which reflects their energetic and active nature. However, today they are primarily kept as pets.