Lateral angiogram of the left carotid arterial tree of a donkey shows variation from the common pattern of this structure. The origin of the linguofacial trunk (black arrow) is directly from the common carotid artery. 1 common carotid artery; 2 external carotid artery; 3 internal carotid artery; 4 occipital artery; 5 linguofacial trunk