Aggression can occurs after a bearded dragon puffs up. The "Sexy" Leg This action is known by a funny nickname to experienced dragon owners the "Sexy Leg". Bearded dragons enjoy affection, and lots of it. Whenever I see a bearded dragon puffing up its beard my first thought is that it feels threatened and intimidated. However, most bearded dragons will change colors and darken when brought to their exotics vet.
They respond to menacing situations by trying to look more imposing to their enemies. Top 7 Reasons Why Bearded Dragons Puff Up. Males can develop a larger black beard, but this isn’t a very accurate method of sexing your dragon. Likewise, bearded dragons will often darken or turn black. Especially, if they aren’t used to traveling or handling. Bearded dragons are small, spiny, tan or yellowish lizards belonging to the genus pogona. Much like the hair that stands up on a cat’s tail or a dog baring its teeth… bearded dragons puff up their beards to typically show aggression towards someone or something. Not all female bearded dragons will lay eggs, but, if you have a female bearded dragon, this scratching of the glass could be a sign that they are getting ready to lay eggs and is most likely accompanied by digging as well. Fun Fact-Bearded Dragons have an extra eye-lid, when the adults puff there eyes and they look pink it is the 2nd eye-lid membrane covering the eye. They puff out these pouches employing air. The "Sexy" Leg This action is known by a funny nickname to experienced dragon owners the "Sexy Leg". Aggression After Puffing Up. Their digestion is temperature-dependent; if they are too cold, their food will simply rot in their stomachs. The species most commonly kept as pets is Pogona vitticeps, the inland bearded dragon. Don't feel insulted, because as beardies get older, they puff out less and less, especially if you spend a lot of time with them. Bearded dragons are equipped with spiny pouches on their throats, right below their necks. Good Luck. Typically, this will happen at or around 2 years, but could happen as soon as 18 months. Bearded dragons get their common name from the spiny scales that coat the skin over their throats like whiskers and their ability to flare out this skin when either threatened or displaying dominance.
As this happens, their pouches take on a temporarily darker tone, close to black. Both sexes do this, but males have a darker throat that turns jet black during a display. When feeling threatened, a bearded dragon will flatten its body against the ground, puff out its spiny throat and open its jaws to make itself appear larger.

Bearded dragon puffing isn't limited to their throat areas.

For one, if you have one bearded dragon, it’s hard to compare the blackness of your dragon’s beard with anything else.