Black
The black Syrian hamster is a color variety of Mesocricetus auratus, not a separate breed. The mutation produces a dark coat that may be solid black or combined with pattern genes such as banded, dominant spot, roan, or tortoiseshell; in the pet trade it is sometimes called a black bear hamster, especially when long-haired. Young black hamsters are usually deepest in color, while some adults develop brownish or silvering tones with age, rubbing, or sun exposure. Eye color is normally black, and the color can be hidden or altered when crossed with cream, white, or patterned lines.
Husbandry is the same as for any Syrian hamster: one adult per enclosure, deep bedding for burrowing, a large solid running wheel, chew-safe furnishings, and a balanced hamster diet with measured treats. Black color does not make a hamster hardier or more social, so temperament and handling history matter more than shade when choosing a pet. Breeders working with black lines track recessive carriers and pattern genes carefully, since unplanned pairings can produce colors that are difficult to identify and may carry unwanted health or conformation traits.
Colors: Black Banded, Black Dominant Spot, Black-Eyed White, Black Roan, Solid Black