The Yorkillon is a hybrid breed, resulting from a cross between a Yorkshire Terrier and a Papillon. It typically features a small, agile body, weighing around 4 to 10 pounds. The Yorkillon inherits a long, silky coat, often requiring regular grooming, and expressive butterfly-like ears from the Papillon parent.

The Yorkillon is not a naturally occurring animal species but rather a designer dog breed, resulting from a cross between a Yorkshire Terrier and a Papillon. As such, it does not have a native region in the wild.

As a domesticated hybrid dog breed, the Yorkillon typically resides in human homes. They are adaptable to various living conditions but thrive in environments where they receive adequate attention, exercise, and care.

The Yorkillon's ecological niche is primarily within human households. As companion animals, they fulfill roles such as providing companionship, emotional support, and participating in family activities. They do not occupy a traditional ecological niche in the wild.