The dahu is a legendary creature well known in France, Switzerland and the north of Italy.

French pranksters often describe the dahu as a mountain goat-like animal with legs of differing lengths.

Regional variations on its name include dahut or dairi in Jura, darou in Vosges or darhut in Burgundy; also called a tamarou in Aubrac and Aveyron), and tamarro in Catalonia and Andorra. The dahu cub is called a dahuot.

In French lore, the dahu has the appearance of a deer or ibex, but with the principal characteristic that its legs on one side of its body are shorter than on the other side. This enables it to walk upright on the steep slopes of its mountain environment. It can only walk around the mountain in one direction. Legend attributes various differing descriptions to the animal, including the laevogyrous dahu (which has shorter legs on the left side, and thus goes around the mountain counter-clockwise) and the dextrogyre dahu (which has shorter legs on the right side, and thus goes around the mountain clockwise). These seldom interbreed according to French lore. However, when interbred, it is believed that there are two more types of dahu. These two variations have never been seen, but are believed to exist. These variations have the leg pairs across the diagonals. This means that the dahu can have a long front right and back left leg, or a long front left leg and back right leg. It is also said that male Dahus have legs shorter on the right side and that females have shorter legs on the left side, thus making them walk in opposite directions around the mountains enabling to find each other and mate. Also, the male dahu has testicles that drag down onto the ground leaving a scent trail for members of the opposite sex to trace. Males also use the scent trails to find their next molestation victim, for dahus are known for harassing each other to assert dominance.