330 The Naturalist in La Plata.
emotion so slight as to be scarcely perceptible to the greatest extremes of rage or terror.
(2) The angry excitement roused in some animals when a scarlet or bright-red cloth is shown to them. So well known is this apparently insane instinct in our cattle that it has given rise to a proverb and metaphor familiar in a variety of forms to everyone.
(3) The persecution of a sick or weakly animal by its companions.
(4) The sudden deadly fury that seizes on the herd or family at the sight of a companion in extreme distress. Herbivorous mammals at such times will trample and gore the distressed one to death. In the case of wolves, and other savage-tempered carnivorous species, the distressed fellow is frequently torn to pieces and devoured on the spot.
To take the first two together. When we consider that blood is red; that the smell of it is, or may be, or has been, associated with that vivid hue in the animal's mind; that blood, seen and smelt is, or has been, associated with the sight of wounds and with cries of pain and rage or terror from the wounded or captive animal, there appears at first sight to be some reason for connecting these two instinctive passions as having the same origin--namely, terror and rage caused by the sight of a member of the herd struck down and bleeding, or struggling for life in the grasp of an enemy. I do not mean to say that such an image is actually present in the animal's mind, but that the inherited or instinctive passion is one in kind and in its work-
The Strange Instincts of Cattle. 331
ing with the passion of the animal when experience and reason were its guides.