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This is a bearded dragon (Pogona vitticeps) living in a custom-built desert/cactus vivarium packed with a diverse collection of cacti.

The Inhabitant (Lizard)

• Species: Bearded dragon (common “beardie”). The dark gray coloration is typical when they’re cooling down, basking, or in certain lighting — they can shift shades dramatically.
• Key features: Robust body, broad head, long tapering tail, and the classic “beard” (spiky throat scales) visible even in this angle. They’re one of the most popular pet lizards and thrive in exactly this kind of arid setup.

The Plants (Cactus Collection)

You’ve crammed the enclosure with a really impressive variety of Cactaceae:

• Columnar types — the tall, ribbed green stems are mostly Echinopsis/Trichocereus species (formerly called Trichocereus) and Cereus — very common in large vivariums because they grow tall and provide structure/climbing.
• Fuzzy/white “Old Man” cacti — the ones with long white hair/spines are Cephalocereus senilis or Espostoa lanata (Old Man Cactus). Those shaggy ones are eye-catching but very slow-growing.
• Globular/barrel cacti at the bottom — likely Mammillaria or Echinocactus species (the round, heavily spined ones).
• Scattered smaller potted cacti and some driftwood for extra climbing and hiding spots.

Quick Care Tips for This Setup

For the Bearded Dragon:

• Temperature: Hot basking spot 95–110°F (35–43°C), cool side 75–85°F (24–29°C). Night drop to low 70s°F is fine.
• Lighting: Strong UVB (T5 or mercury vapor bulb) + basking bulb on 12-hour timer. Replace UVB every 6–12 months.
• Diet: 70–80% insects (dubia roaches, crickets, etc.) + 20–30% veggies/greens daily when young; shift more plant-heavy as adults. Dust with calcium + multivitamin.
• Humidity: Keep it low (30–40%) — bearded dragons are from arid Australia. The dense cacti help with microclimates but watch for mold in the substrate.
• Substrate: Your mix looks like a good arid bioactive blend (soil + sand + gravel). Avoid loose sand if the dragon is young to prevent impaction.

For the Cacti (in a vivarium):

• They love the bright light your setup obviously gets — perfect for them.
• Water very sparingly (every 2–4 weeks, only when bone-dry) and spot-water the base of the plants so you don’t soak the whole substrate and raise humidity too much.
• The spines are great for visual interest but can occasionally poke the dragon’s eyes or skin — most beardies learn to navigate around them, but keep an eye on it. If it becomes an issue, you can always thin some of the densest sections.

This is a really cool, high-impact vivarium — way more ambitious than the average beardie setup! It ties in nicely with the other plants you’ve been showing me (the Dorstenia, chin cactus, and papaya).

If you want tips on anything specific (feeding schedule, safe plants to add, how to handle the spines, or breeding the cacti), or if you’d like me to ID any of the individual cacti more precisely, just let me know! What’s next in the collection?