d&d how long do dragons live
First, a Wyvern has dragonsblood but are not what the MM deems a true dragon. Be that as it may, it seems true dragons live to 800 years old or more. Let's say we cut that in half for a Wyvern and make it 400 (Speculation). Now you have a measurement of time. Wyrmling: 5 years old or less; Young: 6 - 100 years