Dragons are creatures with nearly unlimited life spans. They can survive for long periods of time, and no one has found a dragon that has died of old age. Adolescence is usually marked by the growth of a hatchling's wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. Once they hit adolescence, hatchlings change quickly, maturing to their full forms in only 2 years.

Dragons don't communicate with each other verbally, but they will growl to scare off predators and frighten prey. Young dragons will emit an extremely high-pitched squeal when they are frightened. To communicate, they use telepathy with each other and to speak to other creatures.

Dark green dragons, once they mature, appear to become an entirely different species. However, this isn't true. Rather, they burrow underground and get nutrients from their vines. These vines are sometimes referred to as Dragon Grass. These dragons are very violent, and will use their vines to capture, kill, and eat anything that moves, as well as nearby plants. Luckily, their range is limited and they cannot use magic. Dark green dragons tend to be easy to spot since they usually kill all plants around them and thus are usually surrounded by a large clearing.

Ivy Thorntree is probably the most anti-social of Dragon Writer's friends, allowing no one but Dragon Writer and a very few of his friends to come near. She's more than willing to kill any intruders who aren't protected by her human friend, and can be quite mean even to those, if they annoy her too much.

She has more than once remarked to Dragon Writer, after hearing the other dragons talking, that she would take over the world herself, if only it didn't involve so many people. Despite her mutterings, she nevertheless helps the others stand guard during meetings of the Draconic Revolution.