Okay, dragons are an immensely varied species, so let’s explore the basics.
Most dragons have wings, like a bat with extended fingers creating the frame, giving dragons six limbs and feet that they can use with versatility. Their tail also has many uses, steering in flight, propelling in the water, and as a defensive weapon. Scales cover dragons’ bodies, growing with them, shielding them, and as they’re used as armor, a dragon does not shed its skin. Their feet tend to have three or four toes forward facing and a thumb-like digit that allows them to grasp objects.
Their teeth are strong as are the muscles of their jaws. With four fangs, the number of other teeth depends on their age and what they eat. Horns that point backwards are meant for grooming and those aimed forward are defensive.
Their senses, on a majority, are heightened. Sight adapted for hunting allows them to accurately judge distances and see in the dark. A forked tongue helps with sniffing and sensing others by their scent. Taste is exceptional, although dragons tend to hate sweet flavors. Blindsense allows them to see invisible things and see with their eyes closed. However, their touch is deadened due to their thick skin, scales, and clawed feet, and their hearing is no better than humans.
Dragons’ brains are large, making them smart. They love riddles and poetry and art and jewels. They tend to be reclusive, solitary creatures, hidden away in lairs. They prefer their own company but makes exceptions when mating and raising children or wyrmlings. They rarely unite and fight together against a foe, which is why most encounter only one dragon at a time. But they will fight each other over treasure, lairs, or mates.
Finally, dragons are incredible fighters, able to incapacitate their enemies with a range of natural weapons. Dragon’s breath, for instance, stretches amongst various chemicals that are as different as each individual. If one has enough in its lungs, one can blow dragons breath onto its victims. Dragonfear freezes a victim’s muscles, pumps them with adrenaline, and clenches their stomach. And dragons also have a nature talent for spellcasting, which links with their own unique personalities.
Source: Suncatcher, Sindri. A Practical Guide to Dragons. Mirror Stone Books. 2006.