The Caranchos, says Mr. Darwin, together with the voracious Chimangos, constantly attend in numbers the _estancias_ and slaughter-houses. If an animal dies on the plain, the Milvago begins the feast, and then the Caranchos pick the bones quite clean. Besides devouring the carrion of large animals, these birds frequent the borders of streams and sea-beaches to pick up whatever the waters cast ashore. In Terra del Fuego and on the west coast of Patagonia they must live exclusively on such supplies. The Caranchos are said to be crafty and to steal great numbers of eggs. They attempt also, together with the Chimango, to pick the scabs from the sore backs of horses and mules; the poor animals on the one hand with ears down and back arched, and on the other the hovering bird of prey eyeing at a distance the disgusting morsel, form a picture that has been described by Captain Head with peculiar spirit and accuracy. A person will discover the necrophagous habits of the Carancho by walking out upon one of the desolate plains and there lying down to go to sleep; for when he awakes he will see on each surrounding hillock one of these birds patiently watching him with an evil eye. If a party goes out hunting with dogs and horses, it will be accompanied during the day by several of these attendants, and in the desert between the rivers Negro and Colorado, numbers constantly attend on the line of road to devour the carcases of the exhausted animals which chance to perish from fatigue and thirst.