![](https://i0.wp.com/mediachomp.com/wp-content/uploads/2021/03/fbthumb6090.jpg?resize=680%2C340&ssl=1)
@drakthug drew this handy simple dragon guide. Then biologist Drosophilamelanobastard decided to create a more scientifically rigorous trait based phylogeny (family tree) assigning character states as 0 if the critter has the same state as the universal common ancestor and 1 if they have a derived trait. For example the ancestor probably had no wings so anyone with wings gets a 1 for wings. They then generated a phylogeny by grouping the critters with the most shared derived traits:
![Types of Dragons Guide and Family Tree](https://i0.wp.com/mediachomp.com/wp-content/uploads/2021/03/dragon-biology-charts-01.jpg?resize=650%2C461&ssl=1)
![](https://i0.wp.com/mediachomp.com/wp-content/uploads/2021/11/2CWOO06.jpg?resize=640%2C165&ssl=1)
![](https://i0.wp.com/mediachomp.com/wp-content/uploads/2021/11/y5f7J3u.jpg?resize=640%2C701&ssl=1)
Sources: @drakthug & Drosophilamelanobastard