Al Nelson is the creator of the sounds for the dragons in How to Train Your Dragon. Each dragon has his own unique sounds which also should fit to the size, gender, personality and many other property of these special reptiles. A great challenge - especially when there are no real dragons which can be recorded. He is also known for many Pixar movies, such as: Finding Nemo, Up, and many others.
For How to Train Your Dragon, he won the Golden Reel Award for the Best Sound Editing in Feature Film Animation.