The Natural History of Selborne

While the cows are feeding in moist low pastures, broods of wagtails, white & grey, run round them close up to their noses, & under their very bellies, availing themselves of the flies, & insects that settle on their legs, & probably finding worms & larvae that are roused by the trampling of their feet. Nature is such an oeconomist, that the most incongrous animals can avail themselves of each other! Interest makes strange friendships.