The temperature mechanic has not been in the game for very long, and I had a thought: when dragons are cold, they do not show it. Why not introduce an animation where they shiver when standing or sitting in cold conditions?
And in hot environments, for example, they could let their wings droop slightly. It gets especially hot near a burning IR. Other dragons, such as the SS or the BW, are not as heat-resistant. Perhaps this would be worth considering.