Basic Size Guide
Dragons come in many sizes, and the sizes fall under one of these ranges!
General sizes are flexible as long as they stay larger and smaller then one another but exact heights are not something you need to worry about. Human silhouette is 6 feet.
Gigantic - Ship Breakers
Large - Swift Wings, Woldren
Medium - Udin, Thunder Horns
Small - Dwellers, Sea Gliders
Tiny - Hyvern
Top Down Views
These top down views are general size and shape of wings/extra limbs fully extended. The dragons (compared to one another) are not of correct sizing, but each individual dragons wings are of the rough correct size to its body. This image also shows general bone placement. If there is no red marks, ther are no bones in those extra limbs. Some dragons instead of bones may have cartilage or similar structure which is not shown here.
Written and spoken language
All dragons on the island speak and write in the same tongue/runes. Even if they do this, each area may have its on dialect or slang terms they call things.
The written language is in runic script, made with bold strikes, lines and spots. Writing is often done with claw tip or quill, leaving some runes to have a bold end and a tapered "flicked" end where they lift their claw/pen from the paper. The runes were made in mind for ease of writing with said claws, before some dragons switched to magic powered feather quills. While they have a full alphabet like the humans, they also have 3 special symbols to help reduce strain on the writer, these are used as short cut runes for common letter combos. Those combos are "th", "ing" and "ed".
You are not required to use the dragon runes when doing anything game related, but its there for those who wish to use it!
Food and food culture
Dragons love to eat, nearly as much as they love to hoard. All dragons have the ability to consume and process meats, seafoods and plant/fruit matter but some dragon species have preferred diets, either due to location/climate or just...cultural reasons! Some dragons like the food cooked, some prefer it raw. Some dragons like heavily spiced foods, while others like it simply as is....with maybe a slight pinch of salt. Some species, namely Udin, will eat their food with utensils and use plates and other such finery, but most species will simply use special stones made only for meals or large leaves to plate their food, and will either eat directly from them or use their claws to pick up food. If food is roasted on a stick, it's often eaten directly off of said stick/spit.
And we can't forget drinks. While water is the life source, dragons LOVE a good brew. Mostly they drink mead or wine...of course done dragon style, often spiced up with local fruits. It's not uncommon to find a dragon with flasks of both water AND a good mead at their side. There are also brew festivals from time to time celebrating food and drink!
Species to Species interactions
Nearly all the dragons get along with other dragons of differing species, its more of a....dragon to dragon situation. Some dragons prefer the company of their own kind, while others prefer to mix and mingle with others! This could be for a variety of reasons from size differences and fear of injuring one another to vastly differing cultures! There is no hate of one species to the next, however, as that's HIGHLY frowned upon and snuffed out quickly.
Lots of dragon species have thriving trade with other species, as each one seems to have different skills in different areas, and it takes a helping claw some times to survive the harsh wilds of the Islands.