Illustration of the head of the red fox, with the scratchboard technique that consists of a cardboard that has a layer of white gesso and another layer of black ink on top. The illustration is done by scratching the black layer with a knife, leaving the lower white layer in view.

The second illustration, of the skull, is made with the stippling technique.

The common fox or red fox (Vulpes vulpes), is a species of mammal of the canidae family, it is a silent and very cautious animal that hunts especially at night. During the day it remains hidden in the bushes or in its burrows, dug in dry and hidden places, often between rocks, grassy ravines and thickets.