Of all the birds with which we are acquainted, the eagle is looked upon as the most noble, and the most remarkable for its strength. There are six different kinds; the one called “melanaetos” or black eagle by the Greeks, and “valeria” in our language, the least in size of them all, but the most remarkable for its strength, is of a blackish color. It is the only one among all the eagles that feeds its young; for the others, as we shall presently mention, drive them away; it is the only one too that has neither cry nor murmur; it is an 183 inhabitant of the mountains. The second kind is the pygargus (white tail), an inhabitant of the cities and plains, and distinguished by the whi............