Caring for your Rio Grande Gold Tarantula
Rio Grande Gold Tarantula
(Aphonopelma moderatum)
Basic Information:
The Rio Grande Gold Tarantula is a calm, terrestrial species native to the dry scrublands and desert regions of southern Texas and northern Mexico. It is easily recognized by its warm golden-brown coloration, dark legs, and thick, velvety appearance. Adults typically reach a 4–5 inch leg span and are admired for their gentle temperament, making them an ideal tarantula for beginners and collectors who enjoy slow-moving, predictable species.
Lifespan:
Females: 20-25 years
Males: 5-8 years
Sexing:
Sexing is most accurate after a molt by examining the exuviae for female reproductive structures (spermathecae). Mature males are slimmer, leggier, and develop reproductive bulbs on the pedipalps.
Enclosure:
Juveniles: 5–10 gallon enclosure (12” x 12” x 12”).
Adults: 10–15 gallon enclosure (24” x 12” x 12”).
Provide a horizontal setup with a secure hide, shallow water dish, and plenty of open floor space. Avoid excessive height to reduce fall risks.
Substrate:
Use 3–5 inches of a loose, dry mixture of coco fiber, topsoil, and sand. This helps maintain humidity while allowing natural burrowing. Avoid reptile carpets or sharp substrates.
Lighting & Temperature:
Day Temp: 75–85°F
No special lighting required
Maintain ambient temperature with heat mats or room temperature
Avoid direct sunlight
Humidity:
Maintain 50–60% humidity, with light, occasional misting on one side of the enclosure. Good ventilation is essential to prevent mold.
Food:
Insectivorous: crickets, roaches, small mealworms
Feed juveniles every 3–4 days, adults once a week
Remove uneaten prey to prevent stress
Water:
Provide a shallow water dish with fresh water. No sponge is necessary—just keep it clean.
The Rio Grande Gold Tarantula is a hardy, slow-growing, and beautifully colored species ideal for both beginners and experienced keepers. Its gentle nature and striking appearance make it a rewarding, low-maintenance display animal.
I live in Virginia; where can I get these tarantulas?
Rio Grande Gold Tarantulas are available now at Critters, Reptiles & Exotics in Frederick County, Maryland! Stop by to meet these calm, desert-dwelling beauties and get expert guidance on their ideal care — because there’s always a new adventure waiting at Critters, Reptiles & Exotics!