Book,  Paragraph

  1   I,  3 |        and having a lung) to all birds and oviparous quadrupeds.
  2   I,  3 |          the hypozoma (as in all birds and in viviparous fishes).
  3   I,  4 |        not yet been drawn up. In birds and oviparous quadrupeds
  4   I,  4 |          is clear in the case of birds, for their testes are much
  5   I,  5 |         them to have it, but for birds and the footless animals
  6   I,  5 |          the same reason as with birds, because their union must
  7   I,  8 |  viviparous quadrupeds), high in birds and all oviparous quadrupeds.
  8   I,  8 |         to seed.~But the eggs of birds and the quadrupedal ovipara
  9   I,  11|         most part the same as in birds, for the egg descends and
 10   I,  12|       scaly animals. The skin of birds also is hard so that it
 11   I,  12|          in fishes compared with birds and oviparous quadrupeds.
 12   I,  21|         scoleces.~What occurs in birds and oviparous fishes is
 13   I,  21|         are anxious to rear fine birds act thus; they change the
 14   I,  21|          Yet in some animals, as birds, the nature of the female
 15  II,  1 |          a perfect condition (as birds and all oviparous quadrupeds
 16  II,  1 |       bipeds are viviparous (for birds are oviparous), nor are
 17  II,  1 |       egg within themselves. For birds and scaly reptiles because
 18  II,  4 |     uterus near the hypozoma, as birds and viviparous fishes, it
 19  II,  5 |         plain in the case of the birds that lay wind-eggs, showing
 20  II,  6 |         say. This is manifest in birds, fishes, and insects. For
 21  II,  7 |      seen to take place in those birds that are amative, as partridges
 22  II,  7 |       partridges and hens. Among birds of prey hawks of different
 23  II,  7 |       same applies to some other birds. Nothing worth mentioning
 24 III,  1 |        But among the ovipara (1) birds produce a perfect hard-shelled
 25 III,  1 |         disease, and the eggs of birds are all two-coloured. (2)
 26 III,  1 |        and sometimes high, as in birds.~Some embryos are formed
 27 III,  1 |       Some embryos are formed in birds spontaneously, which are
 28 III,  1 |          by some; these occur in birds which are not given to flight
 29 III,  1 |    produce many young, for these birds have much residual matter,
 30 III,  1 |  residual matter, whereas in the birds of prey all such secretion
 31 III,  1 |         for this same reason the birds of prey are neither given
 32 III,  1 |      many eggs, as are the heavy birds and those flying birds whose
 33 III,  1 |     heavy birds and those flying birds whose bodies are bulky,
 34 III,  1 |    secreted largely in the heavy birds not given to flying, such
 35 III,  1 |   produce much material. Of such birds some lay many eggs at a
 36 III,  1 |        For these are between the birds of prey and the heavy ones;
 37 III,  1 |          their food, whereas the birds of prey do so with difficulty.~
 38 III,  1 |        so with difficulty.~Small birds also tread often and are
 39 III,  1 |       producing young. And other birds are more fertile than game-fowl,
 40 III,  1 |       making the former class of birds naturally inclined to tread
 41 III,  1 |        being added at the other. Birds of prey, on the contrary,
 42 III,  1 |         it is pursued by all the birds and lays eggs in the nests
 43 III,  1 |          the facts that with the birds that lay many eggs the nutriment
 44 III,  1 |         after this. For both the birds the plants become exhausted,
 45 III,  1 |         have now stated in which birds wind-eggs are found, and
 46 III,  1 |     found, and also what sort of birds lay many eggs or few, and
 47 III,  1 |       the female of all animals, birds have no discharge of catamenia
 48 III,  1 |       same applies to fish as to birds, and so in them as in birds
 49 III,  1 |      birds, and so in them as in birds is found an embryonic formation
 50 III,  1 |         of vivipara is formed in birds at the appropriate season
 51 III,  1 |        size is concerned, but in birds and fishes alike it is imperfect
 52 III,  1 |         not formed in the flying birds, for the same reason as
 53 III,  1 |       for the residual matter in birds of prey is small, and they
 54 III,  1 |     observed, then, that neither birds’ nor fishes’ eggs are perfected
 55 III,  1 |          speaking in the case of birds even the impregnated eggs
 56 III,  1 |        so this happens also with birds; the residual matter corresponding
 57 III,  1 |         a slight touch. And such birds are of a lascivious and
 58 III,  1 |         that lay eggs externally birds produce their egg perfect,
 59 III,  1 |       passage. While the eggs of birds are two-coloured, those
 60 III,  1 |          is what we find in lake birds, for they are of a moister
 61 III,  1 |         are colder than the land birds, so that the so-called "
 62 III,  1 |         yolk in the eggs of such birds is large and less yellow
 63 III,  1 |     white. Even the wind-eggs of birds have this distinction of
 64 III,  1 |    therefore at first the egg in birds appears white and small,
 65 III,  2 |    breasts, Nature does this for birds in the egg. The opposite,
 66 III,  2 |        incubation, both those of birds and those of oviparous quadrupeds.
 67 III,  2 |         the same way as those of birds, for they are hard-shelled
 68 III,  2 |         hypozoma as are those of birds, and in all other respects
 69 III,  2 |         their strength, those of birds are more exposed to destruction
 70 III,  2 |        and some quadrupeds; with birds we find it till they have
 71 III,  2 |      should be the case with the birds that lay many eggs, for
 72 III,  2 |   happens none the less with the birds of prey though they lay
 73 III,  2 |    hatched in all those, whether birds or quadrupeds, which lay
 74 III,  3 | circumference, being colder than birds), the egg of the frog-fish
 75 III,  3 |    partly different from that in birds’ eggs. In the first place
 76 III,  3 |    attached to the uterus, as in birds, for the chick is developed
 77 III,  3 |        reason is that the egg of birds is separated from the uterus
 78 III,  3 |        consumed by it just as in birds and the other animals detached
 79 III,  3 |     asked why the development of birds and cartilaginous fishes
 80 III,  3 |   respect. The reason is that in birds the white and yolk are separate,
 81 III,  3 |      fishes differs from that of birds, but otherwise it takes
 82 III,  3 |        in like manner as that of birds connecting with the yolk,—
 83 III,  5 |   fish-eggs differ from those of birds in one circumstance. Birds
 84 III,  5 |       birds in one circumstance. Birds and all oviparous quadrupeds,
 85 III,  5 |         For just as the class of birds in some cases has eggs without
 86 III,  5 |          fluid upon them. Now in birds this must take place while
 87 III,  6 |        also of the generation of birds. For there are some who
 88 III,  6 |    consideration. Concerning the birds, they are deceived by a
 89 III,  6 |       their beaks, as do all the birds of the raven family; this
 90 III,  6 |      with domesticated jackdaws. Birds of the pigeon kind do the
 91 III,  6 |        not amorous, for they are birds that produce few young,
 92 III,  6 |         the nutriment; and these birds have a uterus like others,
 93 III,  7 |         discussions, the eggs of birds are perfected internally
 94 III,  7 |    perfection of the egg both of birds and of fishes, only in the
 95 III,  7 |       the same in both cases.~In birds the wind-eggs become fertile,
 96 III,  7 |       with them as with those of birds. This fact is what we should
 97 III,  7 |        off from one another, the birds egg already contains the
 98 III,  7 |         male sex in the class of birds, the egg would have been
 99 III,  7 |          both sexes exist in all birds, so that, considered as
100 III,  9 |        being by copulation, like birds and vivipara and most fishes,
101  IV,  4 |         with one another. But in birds, he says, since copulation
102  IV,  4 |   producing many, most of all in birds and among birds in the common
103  IV,  4 |        of all in birds and among birds in the common fowl. For
104  IV,  5 |      this intercourse. And among birds the hens are less disposed
105  IV,  5 |        that, if any kind of such birds has much semen naturally,
106  IV,  6 |        plants.~The young of some birds also are hatched imperfect,
107  IV,  6 |        this applies to all small birds which lay many eggs, as
108  IV,  6 |       their sight again, for the birds are still developing, not
109  IV,  6 |         with aquatic animals and birds. If it ever happens that
110   V,  3 |        to it, as the feathers of birds and scales in the class
111   V,  3 |        others are deciduous, and birds which hibernate shed their
112   V,  6 |         condition exists also in birds, fish, and the other classes
113   V,  6 |      cattle and goats and, among birds, pigeons; the same applies
114   V,  6 |   applies also to other kinds of birds. The whole-coloured change
115   V,  6 |         also vari-coloured.~Some birds and some wild quadrupeds