Includes images of eggs and embryos. Check out the description of how embryos are revealed. Most eggs are found in groups or nest sites. These groups suggest dinosaur rookeries. Nest sometimes found in a vertical sequence of strata, suggesting a long occupancy period of the rookery.
Rookeries can have a size range of skeletal remains.
So far 26 eggs have been exposed in a nest, arranged in a circle some 6 feet across. Oviraptor found in Mongolia where it apparently died incubating 15 eggs. Modern cold-blooded reptiles grow slowly to their full adult size. Using rather complete skeletons of hatchlings and adults of the same species, body weights estimates have been made for each . If warm-blooded with growth rates similar to modern elephants, much of this growth may have occurred in as little as 3 to 4 years.