Leafwings are supposed to be extinct due to the great Tree Wars some 50 years prior to current events. Here's the Pantalan dragon guide to them:

      Names:
Names are based on Trees, and their appearances are based on leaves, duh.

      Coloration:
Different shades of green and brown.

      Wings:
Their wings are leaf shaped, obviously.

      Other Info:
Leafwings have the ability to absorb sunlight, and are very good gardeners. Some of them had unusually strong powers over plants. *hint hint*

      Living Characters:
Sundew is the only known surviving Leafwing.

      Sundew
We don't know much about her other than she helps Blue at some point in the book, and wears a second pair of false wings to disguise herself.