The bearded dragon lives up to its name: Like a dragon, it’s equipped with armor of spiny reptilian scales, which include a “beard” of spikes under its chin that puffs up depending on its mood. There are eight species of bearded dragons recognized today, all of which are affectionately called “beardies.” Among the most popular pet reptiles, bearded dragons tend to be gentle, inquisitive, and active during the day. The central bearded dragon, Pogona vitticeps, is the most common species to have as a pet.