Archaeopteryx that in an ostrich (4.2 micrometres per day). Using this range of bone growth rates, they calculated how long it would take to "grow" each specimen of "Archaeopteryx" to the observed size; it may have taken at least 970 days (there were 375 days in a Late Jurassic year) to reach an adult size of . The study also found that the avialans "Jeholornis" and "Sapeornis" grew relatively slowly, as did the dromaeosaurid "Mahakala". The avialans "Confuciusornis" and "Ichthyornis" grew relatively quickly, following a growth trend similar to that of modern birds. One of the few modern birds that exhibit
Color a Dinosaur Color a Dinosaur Color a Dinosaur is a 1993 electronic coloring book video game for children. It was developed by FarSight Studios for the Nintendo Entertainment System. The player colors various dinosaurs by using the provided dinosaur images and palettes. Players can either color using the free form mode or in the automatic mode where they choose only a color. Intended for ages 3 to 6, the game lacks sophisticated features such as animation and minigames, and the basic colors are either brightly colored patterns or limited variations on pink or red. An extra set of patterns can be reached