(This is in a medieval fantasy setting)
Let me describe the creatures for you.
There are a warm-blooded species of semi-humanoid dragon-like creatures. They have the traditional draconic features, save for a lack of wings, but a humanoid build that is slightly hunched forward, akin to a Warhammer Fantasy Saurus, though bulkier around the waist/legs. They can run on all fours if needed and have snake-like necks; proportionally their necks would be about twice as long as a human's of comparable size, and heavily muscled.
-There's significant dimorphism among the species, with sizes and builds ranging from small (roughly the size of a large dog) dragon-like beings to very tall and large (horse/bear-sized) dragon-like creatures. Females tend to be larger than males. They have comparable muscle mass and strength/speed to creatures of that size, i.e. a dragon-like who is the size of a bear can probably hit as hard as a bear.
-Their scales make them moderately resistant to cutting an tearing with claws, teeth, and piercing weapons like spears and arrows, but they are only slightly effective against metallic bladed weapons and aren't very effective against blunt weapons.
They exist in a world with several other fantasy races. Elves, dwarves, humans, giants, orc-like creatures, and at least one species of pure, destructive evilness (think Dawkspawn from Dragon Age or Skaven from Warhammer Fantasy). Wars and diplomacy with all of the above (save the latter, of course, that's just pure warfare) has happened throughout their history.