The Taurus Project of the German Arbeitsgemeinschaft Biologischer Umweltschutz aims to re-create the extinct aurochs, the wild ancestor of domestic cattle, by cross-breeding Heck cattle with aurochs-l
The Taurus bull "Lamarck" (50% Sayaguesa, 25% Heck, 25% Chianina) in the Lippeaue reserve in North Rhine-Westphalia
Chianina is one of the breeds that are used in breeding Taurus cattle.
The Taurus bull "Leonardo" (Chianina × Heck) from Lille Vildmose, 2004
Breeding back is a form of artificial selection by the deliberate selective breeding of primarily domestic animals, in an attempt to achieve an animal breed with a phenotype that resembles a wild type
Heck cattle were bred in the 1920s to resemble the aurochs.
Heck horse in Haselünne, Germany
A Tamaskan Dog, bred to visually resemble a wolf