The complete beginner's guide to bearded dragon care — enclosure, UVB lighting, diet, brumation, and why your beardie is waving at you.
Bearded dragons are the most popular pet lizard in the world. They're social, expressive, and genuinely seem to enjoy human interaction. They wave their arms, bob their heads, puff out their beards, and develop individual personalities that make every beardie unique.
They also need more specialized care than pet stores typically explain. UVB lighting alone trips up most new owners. This guide covers everything you need to get it right from day one.
Juveniles (0-6 months): A 40-gallon breeder tank minimum. Yes, even for babies. Bearded dragons grow fast and are active. Unlike geckos, they don't feel overwhelmed by space. They use it.
Adults (12+ months): 75-gallon minimum, but 120-gallon or a 4x2x2 foot enclosure is strongly recommended. Beardies are active during the day. They bask, they explore, they chase insects. More room means a healthier, more stimulated dragon.
Shape: Long and wide, not tall. Bearded dragons are semi-arboreal as juveniles but primarily terrestrial as adults.
This is where bearded dragon care diverges sharply from many other reptiles. Bearded dragons absolutely, non-negotiably require UVB lighting. This is not optional. It is not "nice to have." Without adequate UVB, your dragon will develop Metabolic Bone Disease, which causes deformed bones, paralysis, and death.
Recommended UVB bulbs: Arcadia T5 12% or 14% (Desert or Dragon series), or Zoo Med ReptiSun T5 10.0. Mount inside the enclosure or on top of a mesh screen (UVB is reduced by 30-40% through screen).
Coverage: The UVB bulb should cover 2/3 to 3/4 of the enclosure length. Your dragon needs to be able to bask under UVB and also retreat to a UVB-free zone.
Replace every 6 months. UVB output degrades over time even though the bulb still produces visible light. A bulb that looks fine may be producing zero useful UVB after 6-8 months.
Photoperiod: 12-14 hours on, 10-12 hours off. Use a timer. Consistency matters.
Bearded dragons are desert animals from Australia. They need heat.
Basking spot: 100-110°F surface temperature. Measured with a temperature gun (infrared thermometer), not a stick-on thermometer. The basking spot is directly under a basking bulb (halogen flood bulb is ideal).
Cool side: 80-85°F.
Night temperature: Can drop to 65-75°F. No night heat needed in most homes. If your house gets very cold, a ceramic heat emitter on a thermostat works.
Heating setup: A basking bulb (halogen PAR38 flood bulb, 50-100W depending on distance and enclosure) provides focused heat from above. This mimics the sun. Under-tank heaters are not recommended as the primary heat source for bearded dragons.
Tile or textured shelf liner: Easiest to clean, no impaction risk, provides nail-trimming surface. Most experienced keepers use this.
Excavator clay: Can be shaped into hills and tunnels when wet, hardens when dry. Provides enrichment and a naturalistic look.
Topsoil/play sand mix (70/30): A naturalistic option for adults. Not recommended for babies (impaction risk with loose substrate is higher in juveniles who are less coordinated eaters).
Avoid: Calcium sand (marketed as digestible, still causes impaction), walnut shell (sharp, impaction risk), reptile carpet (catches nails, harbors bacteria).
Babies and juveniles (0-12 months): 70-80% insects, 20-30% vegetables. Babies need protein to grow. Offer insects 2-3 times per day, as many as they'll eat in 10-15 minutes per session.
Adults (12+ months): 20-30% insects, 70-80% vegetables. The ratio flips. Adult beardies who eat too many insects become obese. Salad becomes the daily staple, insects become a supplement.
Best options: Dubia roaches (excellent nutrition, easy to keep), crickets (widely available, gut-load before feeding), black soldier fly larvae (high calcium), hornworms (hydration and treats), silkworms (excellent but harder to find).
Avoid: Mealworms for babies (hard chitin), wild-caught insects (pesticides), fireflies/lightning bugs (toxic and fatal).
Size rule: No larger than the space between your dragon's eyes.
Calcium dusting: Every feeding for babies and juveniles. Every other feeding for adults. Use calcium with D3. Add a multivitamin dust once per week.
Daily staples: Collard greens, mustard greens, turnip greens, butternut squash, bell peppers, green beans.
Occasional: Kale (high in oxalates, okay in moderation), carrots (shredded), blueberries, strawberries, mango (fruits as treats only, not daily).
Never: Avocado (toxic), rhubarb (toxic), lettuce/iceberg (no nutritional value), spinach (binds calcium).
Getting a beardie to eat salad: Many juveniles raised on insects resist vegetables. Tricks: mix in a few bugs on top of the salad, use colorful veggies (they're attracted to bright colors), try bee pollen sprinkled on top (beardies love it), be patient and persistent.
Arm waving: A slow, circular wave of one front arm. This is a submissive gesture meaning "I see you and I'm not a threat." Common when they see another beardie, a large pet, or even their own reflection.
Head bobbing: Rapid up-and-down head movement. This is a dominance display. Males do it more often, especially during breeding season. A slow, gentle bob can also be a greeting.
Black beard: The "beard" under their chin turns dark/black. This can mean: territorial display, stress, cold (trying to absorb more heat), or breeding behavior. Context matters.
Glass surfing: Frantically running against the glass walls. Usually means: enclosure too small, too hot, can see their reflection (perceived rival), or they want to come out and explore.
Puffing up: Inflating their body, especially while basking. Usually just stretching to maximize surface area for heat absorption. Normal.
Mouth gaping while basking: Not a sign of respiratory problems (unless accompanied by wheezing). Beardies open their mouths to thermoregulate, like dogs panting. They've reached their optimal temperature and are releasing excess heat.
Brumation is a natural seasonal slowdown similar to hibernation. Not all bearded dragons brumate, but many do, especially adults.
Signs: Reduced appetite, sleeping more, hiding more, less active. Usually starts in late fall/winter.
What to do: Don't panic. If your dragon is otherwise healthy (no weight loss, no respiratory symptoms, recent fecal test was clean), let them brumate. Reduce feeding (they won't eat much anyway), maintain temperatures, continue providing UVB (shorter photoperiod is fine, 8-10 hours), and always keep water available.
When to worry: If a sick dragon is being lethargic, that's not brumation, that's illness. A healthy dragon going into brumation will have been eating and behaving normally before the slowdown started.
Metabolic Bone Disease (MBD): The most serious and most preventable issue. Caused by insufficient UVB and/or calcium. Signs: rubbery jaw, twitching limbs, inability to support body weight, deformed limbs. Prevention: proper UVB + calcium supplementation. Treatment requires a vet.
Impaction: Blocked digestive tract, usually from ingesting substrate or prey items too large. Signs: straining, bloated belly, not eating, dragging hind legs. Prevention: appropriate substrate, correct prey size, proper temperatures for digestion.
Parasites: Common in pet store animals. Signs: runny stool, weight loss despite eating, lethargy. Get a fecal test within the first month of ownership.
Yellow fungus disease: A serious fungal infection. Signs: yellow/brown patches on skin that don't shed off, spreading discoloration. Requires aggressive vet treatment. Caught early, it's manageable. Late-stage is often fatal.
1. Wrong UVB bulb or placement. Compact/coil UVB bulbs don't provide adequate coverage. Use linear T5 tubes. Mount at the correct distance per manufacturer specs.
2. Not changing the UVB bulb every 6 months. It looks fine. It's not. UVB output degrades invisibly. Set a calendar reminder.
3. Feeding adults too many insects. The diet flips at 12 months. Adults need mostly greens. Fat beardies are not healthy beardies.
4. Using a stick-on thermometer. These measure air temperature at the glass, not basking surface temperature. Use an infrared temperature gun ($10-15) to check the basking spot.
5. Mistaking brumation for illness. Healthy adult dragons naturally slow down in winter. If they were eating and active before the slowdown, and they're not losing significant weight, they're probably just brumating.
Beardies are ideal if you want:
They're not ideal if: you can't invest in proper UVB lighting and replace it on schedule, you don't have room for a large enclosure (4 feet long for adults), or you're uncomfortable with feeding live insects.
For the complete guide including breeding, advanced health protocols, and a printable emergency card, check out the ExoGuide Bearded Dragon Care Handbook.
Last updated: March 2026. Care parameters verified against veterinary sources and experienced keeper communities.
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