3. Some birds feed on worms, as the finch, the sparrow, batis, chloris, titmouse. There are three kinds of titmouse; the spizites is the largest, it is as large as the finch. Another is called the orinus, because it dwells in mountains; it has a large tail. The third resembles them in everything except its size, for it is very small. The sycalis also, the megalocoryphus, pyrrhulas, erithacus, hypolaïs, œstrus, tyrannis are of this class. The last of these is the least, it is not much larger than a locust; it has a purple crest, and is altogether a graceful and well-formed bird. The bird called anthus also, which is of the size of the finch; the orospizus is like the finch, and nearly of the same size, it has a blue stripe on its neck, and lives in mountainous places. The wren also lives upon seeds. All these and such like birds either partly or entirely live on worms. 4. These birds, the acanthis, thraupis, and that which is called chrysometris, all live upon thorns, but neither eat worms or any other living creature, and they both roost and feed in the same places. There are others which feed on gnats; these live chiefly by hunting for these insects, as the greater and lesser pipo, both of which are by some persons called woodpeckers. They resemble each other in their cry, though that of the larger bird is the louder, and they both feed by flying against trees. The celeos also, which is as large as a turtle dove, and entirely yellow; its habit is to strike against trees; it generally lives upon trees, and has a loud voice. This bird generally inhabits the Peloponnesus. There is also another called cnipologus, which is small, about the size of the acanthyllis; its colour is cinereous and spotted, and its voice is weak; this bird also pecks trees. 5. There are other birds which live upon fruit and grasses, as the phaps, phatta, peristera, œnas, and trygon.[216] The phatta and peristera are always present, the trygon only in summer time; in the winter it is not seen, for it hides itself in holes. The œnas is generally seen and captured in the autumn. The œnas is as large as the peristera but less than the phaps. It is generally captured as it is drinking; it comes to this country when it has young. All the rest come in the summer, and make their nests here, and all, except the pigeon tribe, live upon animal food. [216] Different species of pigeons and doves. 6. All birds, as far as food is concerned, are either terrestrial or live in the neighbourhood of rivers and ponds, or near the sea. Those that have webbed feet pass the greater part of their time on the water; those with divided feet near the water. Some of these dive for their food, such as live upon plants and do not eat flesh; others, as the heron and white heron, live in ponds and rivers. The latter of these is smaller than the former, and has a flat large bill.