Book, Paragraph

 1   I,  2 |          break up a natural group, Birds for instance, by putting
 2   I,  2 |            dichotomies, where some birds are ranked with animals
 3   I,  2 |         different class. The group Birds and the group Fishes happen
 4   I,  3 |      instance to form the class of Birds and the class of Fishes,
 5   I,  4 |            excess and defect; some birds have long feathers, others
 6   I,  4 |            is, not the whole class Birds collectively, but the Ostrich,
 7   I,  4 |       instinct of mankind, such as Birds and Fishes, or groups not
 8   I,  4 |          of such a similarity that Birds, Fishes, Cephalopoda, and
 9   I,  5 |     assemblages, like the class of Birds, of closely allied groups
10  II,  9 |   variations of character. Thus in Birds there are bones, but these
11  II,  9 |            horns, and the beaks of birds, all of which are intended
12  II,  12|                              12~In birds, on the other hand, there
13  II,  13|                        13~Men, and Birds, and Quadrupeds, viviparous
14  II,  13|   quadrupeds, and the heavy-bodied birds as well as some others,
15  II,  13|            to close the eye; while birds blink by means of a membrane
16  II,  13|     oviparous quadrupeds, and such birds as resemble them in closing
17  II,  13|         makes them do so. For such birds as have heavy bodies are
18  II,  13|         the thickness of the skin. Birds therefore of this kind close
19  II,  13|           lids for the purpose. As birds are covered with feathers,
20  II,  13|      performed by the heavy-bodied birds by means of the membrane
21  II,  13| nictitation than two; and in these birds this starting-point is the
22  II,  13|        blink in like manner as the birds; for, living as they do
23  II,  13|           essential requisites for birds, inasmuch as they have to
24  II,  13|   distances. This too explains why birds with talons, that have to
25  II,  13|         greater heights than other birds, are sharpsighted; while
26  II,  14|         lashes on the eyelids; but birds and animals with scale-like
27  II,  16|           sanguineous animals, the Birds, the Serpents, and the Oviparous
28  II,  16|            natural conformation of birds. For they are winged bipeds;
29  II,  16|          is, as have teeth. For in birds, as already has been said,
30  II,  17|           said explains why, among birds, those that are most capable
31  II,  17|           vocal articulation. Some birds have a considerable variety
32  II,  17|       smaller kinds. But it is the birds with talons that have the
33  II,  17|           the broader tongues. All birds use their tongues to communicate
34 III,  1 |         other would be useless.~In birds the mouth consists of what
35 III,  1 |           it serves. Thus in those birds that are called Crooked-clawed
36 III,  1 |          hooked, inasmuch as these birds are carnivorous, and eat
37 III,  1 |          than in the generality of birds. Similarly in each other
38 III,  1 |       strong, as also in crows and birds of crowlike habit, while
39 III,  1 |        habit, while in the smaller birds it is delicate, so as to
40 III,  1 |            minute animals. In such birds, again, as eat herbage,
41 III,  1 |          an animal which, like the birds in question, lives on roots.
42 III,  1 |     Moreover, in these root-eating birds and in some others of like
43 III,  6 |          air, the animals known as birds. For in all these the lung
44 III,  7 |          fluid to excrete, such as birds and fishes, the spleen is
45 III,  7 |           scaly plates, just as in birds it is applied to the formation
46 III,  8 |        porous flesh, as it does in birds and in snakes and other
47 III,  9 |          exception. In some of the birds, however, there are flattened
48 III,  12|          with the Vivipara. As for birds, their liver very nearly
49 III,  14|     Researches concerning Animals.~Birds also present variations
50 III,  14|           even more completely-for birds have no teeth at all, nor
51 III,  14|         heat of the stomach. Other birds there are, such, namely,
52 III,  14|          their food. For all these birds feed on substances easy
53 III,  14|        contrast between fishes and birds in the position of these
54 III,  14|           to the stomach; while in birds, if present at all, they