幻翼龙在森林中集群建巢。它们群体狩猎，重视合作。为了保护或寻找龙卵，甘愿赴汤蹈火，永不停息、放弃，直到找到龙卵为止。幻翼龙群类似狮群，主要是由雌龙负责捕猎，它们也会参与保卫领地的争斗。 幻翼龙有很强的好奇心，会模仿一切经过他们眼前的东西。 幻翼龙的卵呈椭圆形，如宝石一样散发着多彩的晕光。有些维京人会把幻翼龙的蛋当作幸运宝石。 幻翼龙非常具有母性，据说，他们会把维京小孩当做幼龙来抚养。但这仅仅被发现过一次。一只幻翼龙捉到了鼻涕粗 ，用双翼抱着它他，并且和他一起玩耍。幻翼龙母亲用训练幼龙的方法训练鼻涕粗飞翔，使鼻涕粗苦不堪言。后来，在小嗝嗝 和 无牙 找到了鼻涕粗，并帮助钩牙从幻翼龙那里带走了他。
The Changewings skin is vulnerable to attack, as it is softer due to its color-changing properties. They can't hide if nothing is in their area for them to camouflage against, such as the sky.
When Changewings get threatened, injured, or scared, they can't control their color changes, making them easier to see.
They are listed as one of the Mystery Class dragons, and it is confirmed that not only can Changewings spit acid, but change colors and hypnotize as well. It is also shown that Changewings are very curious dragons. They are seen in a 2D animation where one burns Bork the Bold while he is making a campfire. The Mystery Class symbol resembles one.
Dragons: Riders of Berk
The Changewings were found on a island. Fishlegs, on his own "secret" island, finds a strange glowing gem while with his beloved dragon, Meatlug. Taking it back to Berk, Gobber identifies it as a "Stone of Good Fortune, (as Gobber gets "Stones of Good Fortune" and Changewing dragon eggs mixed up) causing the citizens to swarm Fishlegs, offering him valuable trades. Overwhelmed, Fishlegs, after refusing to give it to Snotlout, Fishlegs asks Hiccup to help him return it, so that he can forget all about it.
The teens, excluding Snotlout, who is secretly trailing, take it to the island, where they find many of them in nests, and Hiccup realizes that they are truly dragon eggs. Fishlegs returns it, realizing that it must've fallen from its nest and that he had separated it from its mother. When they attempt to leave, the Changewings trail them, invisible, trying to attack them using their acid. They escape, but Snotlout enters undetected and steals many of the eggs. The next day, Snotlout auctions them off, and the gang tries to convince him something terrible will happen if the eggs remain here. He ignores them and declares a "No returns" policy. The Changewings gradually show up, getting their eggs back, but destroying the village in the process. Stoick and Gobber try to fend them off, but realize that it would be impossible to attack things they can't see.
Hiccup and the gang scramble to return the eggs, and they end up with giving them all back, but the Changewings don't leave. Fishlegs realizes Snotlout has kept one and confronts him, displaying anger and strength that scares Snotlout into giving it back. Fishlegs then nervously tries to find them, and the Changewings surround Fishlegs and reclaim their egg from him. Afterwards they roar and terrify the unfortunate Viking but leave him completely unharmed. Hiccup later claimed they would need to find one so they could train it, possibly inferring they will later appear again.
A Wild Changewing was found where it hid an entrance to Bork's cave and "held Snotlout hostage" until Hiccup freed him. The Outcasts had one kept in a cage on their island which along with a caged Whispering Death and Scauldron was later used on an attack on Hiccup, Mildew, and Flystorm.
Dragons: Defenders of Berk
The Outcasts used a herd of wild Changewings during a diversion, where the dragon riders chase them back to Changewing Island. In Free Scauldy, while searching for the Screaming Death, Hiccup, Fishlegs and the twins discovered a Scauldron that had been washed ashore on Changewing Island and been trapped by one wing under a pile of rocks. Despite the threat posed by the Changewings, their dragons refused to leave the Scauldron to die of dehydration, forcing Ruffnut to tame the dragon - which she named Scauldy - so that the others could remove the rocks and fashion a splint for the damaged wing.
Race to the Edge
In Night of the Hunters, Part 1, the riders try to capture a wild Changewing to use its acid to unlock the Dragon Eye. Unfortunately, the Changewing is scared away by Tuffnut but not before shooting acid on Snotlout's helmet.
In Enemy of My Enemy, a wild Changewing attacks Dagur and Hiccup but Dagur makes a sort of dragon call and the Changewing leaves. Later, when the captain of the dragon hunters hides behind a rock, the same Changewing attacks him and presumably kills him.
In Defenders of the Wing, Part 1, the riders free a captured Changewing from the hunters.
Source: Dragons: Rise of Berk. Titan winged Changewings look relatively similar to that of a regular adult one. However, the edges of their wings become sharper and their color turns. They are dark green and their wings have a red edges and splotches of black. The blue spines turn red and the blue horns at the side of their head turn green.
They enjoy mimicry, so if you mimic them, be it by their noises or their movements, they will find you fascinating.
- Edgewing (see When Darkness Falls)
- Phantom (The Legend of Ragnarock comic)
- Melting Wing
- Tuffwing (see Night of the Hunters, Part 1)
- Wild Skies Changewing
- Strangely, according to Book of Dragons, the Changewing breathes acid instead of fire while the special shows one burning Bork the Bold. It could be that their fire is greatly reduced compared to other dragons.
- It is shown that the Book of Dragons doesn't contain a picture of the Changewing, but in the movie, there was a picture of the Changewing in the same book.
- The Changewings facial appearance is similar to that of the Diplocaulus, an extinct, prehistoric amphibian from the Permian period.
- The Changewing appears to be similar in size with the Monstrous Nightmare.
- The Changewings ability to mimic its surrounding in the episode of Gem of a Different Color is different from what's shown in Book of Dragons. Its color mimicry in Gem of a Different Color is fixed on every part of its body while in Book of Dragons, Changewings mimic different colors for different parts of its body, even if it's not in contact with Changewings body making it truly invisible with a little distortion.
- Changewings are similar to RainWings from the Wings of Fire book series. Both can change color, have "Wing" in their name, and spit acid.
- A Changewing's ability to hypnotize is most likely based on the books, where dragons have a hypnotic gaze.
- While Changewings in the animated short, Book of Dragons, camouflage themselves in a chameleon-like way by changing color, in Riders of Berk they disappear completely. In Wild Skies they disappear almost completely, however a faint outline of the dragon is still visible.
- In Book of Dragons, it was said that Changewings display mimicking behavior and love to copy whatever they see. These dragons never show this behavior in the TV Series, most likely because they were defending their territories when the riders encountered them.
- The Changewing is the first dragon species that can change its color.
- Changewings were the first dragons to almost make every Viking on Berk abandon their homes.
- Changewings are mostly nocturnal, so that they can hide more easily.
- Changewings are actually more similar to an octopus than a chameleon due to the fact that chameleons change color to show mood rather than for camouflage. Octopi change both color and skin texture to camouflage themselves, much like a Changewing.
- If this is the case, the Changewings ability to hypnotize may be based on the color-changing ability of a cuttlefish, which it uses to distract its prey.
- In Book of Dragons, Changewings are shown to change their skin to a more realistic solid color similar to chameleons but in the show they camouflage in a more unrealistic invisible "see through" manner.
- The wings of a Changewing are shown to not be double-jointed similar to that of a Thunderdrum.
- In a piece of concept art, a Changewing is seen inflating, which might be a scrapped ability of this dragon.
- According to Hiccup's Map the Changewing can breathe blue fire.