Chrysops viduatus is a species of horse fly belonging to the family Tabanidae.

[3] It is a Palearctic species with a limited distribution in Europe[4] The middle tibiae of C. viduatus are distinctly yellow-brown.

The second abdominal segment is yellow with a well-defined quadrate black spot.

The larvae feed on organic matter in wet peaty detritus.

Adults feed on large mammals including cattle, horses and deer.