Metamorphosis

Metamorphosis was introduced in the book The Lost Continent. It's the process where SilkWings grow their wings, as they are born without them. Dragonets start their metamorphosis when they are 6 years old, and the process takes 5 days. When they complete their Metamorphosis, they are able to spin silk from glands on their wrists. Once a dragon has their wings, they will be assigned a partner and given another cell to live in by the HiveWings. 

Dragonets know their metamorphosis is starting soon when their silk glands start to itch, and their wingbuds (the places on their back where the wings are going to grow) start to ache. When it begins, silk will spiral out of glands on their wrists and start wrapping around the dragonet. Dragonets who are flamesilks (a rare genetic mutation that turns a dragonet's silk into solid fire) will spin flamesilk instead of regular silk, yet they will still undergo metamorphosis with no problems. If one the parents of a silkwing is a flamesilk, there is a 50% chance of the dragonet having flamesilk, and they're closely watched from the moment of birth, to see if they have flamesilk. There is mention of a flamesilk shortage in the series, but it is not confirmed. 

In The Lost Continent, Luna starts her metamorphosis in the Cocoon in Cicada Hive, which is where SilkWings start their Metamorphosis. Luna turns out to be a flamesilk, and is moved to the Flamesilk Cavern, where she wakes up with Blue. After they escape, Blue, Luna, Cricket, and Sundew head to a cave where Blue can start his Metamorphosis. He starts his Metamorphosis and turns out to be a flamesilk. In The Hive Queen, Blue wakes up in the cave where he began, and his adventures continue on from there.