...Birds are generally covered with feathers, a kind of tegument best adapted for defending them from the rapid variations of temperature to which their...cavities which occupy the interior of their body, and hold in the bones, the place of the marrow, increase their specific lightness. The sternal, as well...

...Each of these orders subdivides into families and genera, principally by the conformation of the beak. Birds are, in general, covered with feathers, a sort...marrow in the bones, augment their specific lightness. Sight is extremely perfect in birds, and they have the peculiar faculty of seeing objects near or distant...

...hinder ! only by the taltal ipnri of many оь//|ивгел.— Ко. adapted to protect them from the rapid variations of temperature to which their movements expose them. The air-cavities which occupy the interior of their body, and [usually] even supersede the marrow in their...

...Running Feet. Sing-Dove. little Bustard. Birds are in general covered with feathers, a sort of tegument best adapted to protect them from the effects of the...vertebral, is ossified, to give more force to the dilation of the chest. The eyes of birds are so disposed, as to enable them to distinguish objects...