The English Cocker Spaniel is a medium-sized dog known for its long ears, expressive eyes, and wavy coat. Originally bred as a hunting dog, it is energetic, affectionate, and intelligent. It thrives in active environments and is known for its friendly nature and keen sense of smell.

The English Cocker Spaniel is a domesticated breed of dog originally developed in England. It does not have a 'native' wild region as it has been bred by humans for specific purposes.

As a domesticated breed, the English Cocker Spaniel is typically found in human households. They adapt well to various living conditions as long as they receive adequate exercise and companionship. They thrive in environments where they can engage in physical activities, such as rural areas with access to open spaces, but they are also adaptable to urban settings with regular walks.

The English Cocker Spaniel was originally bred for hunting game birds, particularly woodcock, in England. Thus, their ecological niche in historical terms was as a working dog aiding hunters in marshy or wooded areas. Today, their niche is more commonly as a companion animal, suited for families due to their friendly and affectionate nature.