Bright leaf green dragons with tan underbelly, long sinuous bodies, and catlike grace

Forest dragons are bright leaf green in color, with a tan underbelly. They have long sinuous bodies and move with catlike grace. They are cruel monsters, but they are renowned for their curiosity. They especially like to question adventurers to learn more about their society and abilities, what is going on in the countryside, and if there is treasure nearby. Adventurers may be allowed to live so long as they remain interesting… but woe to them when the dragon becomes bored. Forest dragons are immune to all poisons. Note that, despite their breath weapon being described as "poison gas," damage done by it is exactly the same as with other dragons. More specifically, those in the area of effect do not have to "save or die" as with ordinary poison, but rather save vs. Dragon Breath for half damage.