Afterwards, however, I had repeated opportunities of personal observation on this point. One day I noticed a cow lying down, around which were four or five Blackbirds, hopping on and off her back, and eagerly picking the insects from her body; which service seemed in no wise unpleasing to her. I have also seen them leaping up on cows when grazing; and, on another occasion, jumping to and from a horse’s back; and my lad Sam has repeatedly observed them clinging to a cow’s tail, and picking insects from it, as far down as the terminal tuft. Had cattle been pastured near where I resided, I should doubtless have had many more ocular demonstrations: but the evidence is amply sufficient. In some of these cases, the occurrence was close to me, so that there was no possibility of deception, especially as, being aware of the conflicting statement, I looked with the more interest to satisfy myself. But stationary insects are not the only prey of the Crotophaga; in December, I have seen little groups of them engaged in the evenings, leaping up from the pasture about a yard into the air, doubtless after flying insects, which they seemed to catch. One day in March as I sat at dinner, my attention was arrested by what seemed to be a green bird chased by several Crotophagas, near the top of a lofty tree at some distance, I presently saw that it was a very large lepidopterous insect; it flew over the woods about a quarter of a mile before I lost sight of it, when it appeared to alight on the top of a tree. The birds did not pursue the chase far. I have seen one with a dragon-fly in its beak, which it had just caught, but it may have been while resting. At another time I saw that a Blackbird had actually made prey of one of our little nimble lizards (_Anolis_). These circumstances show, that like the Toucans, the Ani is to some extent omnivorous. Though its usual mode of progression on the ground is by hopping, or rather bounding, the feet being lifted together, the Blackbird is seen occasionally to _run_ in a headlong manner for a short distance, moving the feet alternately. He is fond of sitting in the morning sun on a low tree with the wings expanded; remaining there perfectly still for a considerable time. In the heat of the day, in July and August, many may be seen in the lowland plains, sitting on the fences and logwood hedges with the beaks wide open, as if gasping for air; they then forget their usual loquacity and wariness. Often two or three will sit in the centre of a thick bush, overhung with a matted drapery of convolvolus, whence they utter their singular cry in a calling tone, as if they were playing at hide-and-seek, and requiring their fellows to come and find them.