Capercaillie are the largest of the grouse family. Due to their dependency on woodland they became extinct in Britain in the 17th century, with the last one ever recorded in 1785. They fell victim to the intense forest felling across the country. They have since been reintroduced in 1837, initially with considerable success. The two world wars then increased the demand for wood resulting in a reduction in numbers once more. They have since continued to struggle with poor breeding and much work still needs to be done.

The males are unmistakable, with black bodies and huge size.