Most of the 2,500 to 3,000 wolves in Poland are gray with red or black accents. Black fur comes from a genetic mutation that was likely in domesticated dogs thousands of years ago.

In Poland, the majority of the nearly 3,000 wolves are gray with red or black accents. The black fur is likely from a genetic mutation that occurred with domesticated dogs thousands of years ago.

A second clip, taken last fall, records two black wolves and a gray wolf fording the same stream. Most of the 2,500 to 3,000 wolves in Poland are gray with red or black accents.

Most of the 2,500 to 3,000 wolves in Poland are gray with red or black accents. Black fur comes from a genetic mutation that was likely in domesticated dogs thousands of years ago.

Black fur is a genetic mutation and is a fairly rare one in Europe, where the predominant wolf is grey and "black wolves are almost non-existent," Joanna Toczydłowska, wolf project coordinator of ...

The Mexican wolf, or lobo, is the smallest subspecies of gray wolf in North America, weighing between 50-80 pounds with a characteristic buff, gray, rust and black fur coat.

Most of the 2,500 to 3,000 wolves in Poland are gray with red or black accents. Black fur comes from a genetic mutation that was likely in domesticated dogs thousands of years ago.

Most of the 2,500 to 3,000 wolves in Poland are gray with red or black accents. Black fur comes from a genetic mutation that was likely in domesticated dogs thousands of years ago.

A second clip, taken last fall, records two black wolves and a gray wolf fording the same stream. Most of the 2,500 to 3,000 wolves in Poland are gray with red or black accents.