. The dinosaur book : the ruling reptiles and their relatives. Dinosaurs; Reptiles, Fossil. TRY-ma), from the Eocene of Wyoming. At this same time, however, the birds were developing as tree-living, flying crea- tures, and it was to be in the air, free from the harsh struggle ever present among the animals of the ground, that the birds were to find the environment best suited to the establishment of their final Four stages in the evolution of birds. The primitive bird, Archaeopteryx, had feathers and was probably able to fly, but in many details it was essentially reptilian. The Cr
. The dinosaur book : the ruling reptiles and their relatives. Dinosaurs; Reptiles, Fossil. TRY-ma), from the Eocene of Wyoming. At this same time, however, the birds were developing as tree-living, flying crea- tures, and it was to be in the air, free from the harsh struggle ever present among the animals of the ground, that the birds were to find the environment best suited to the establishment of their final Four stages in the evolution of birds. The primitive bird, Archaeopteryx, had feathers and was probably able to fly, but in many details it was essentially reptilian. The Cre- taceous aquatic bird, Hesperornis, was com- pletely avian in structure, although it still re- Restorations by John C. Germann tained the teeth of its reptilian forebears. In the Eocene period, giant ground birds such as Diatryma may have competed seriously with the early mammals for dominance on the land. The modern birds are adapted for life in the treetops, on the ground, or in the water. 103. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Colbert, Edwin H. (Edwin Harris), 1905-2001; Knight, Charles Robert, 1874-1953; American Museum of Natural History. New York : Published for the American Museum of Natural History by McGraw-Hill
Size: 1617px × 1546px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoramericanmu, bookcentury1900, booksubjectreptilesfossil
