Tarantulas and scorpions are fascinating, low-maintenance arachnids that appeal to both beginners and experienced keepers. With proper housing, diet, and care, they can live many years, providing a unique window into arachnid behaviour.
1. Tarantulas
Overview:
- Terrestrial or arboreal spiders with long lifespans: 10–25 years depending on species and sex.
- Generally docile but may flick urticating hairs or bite if threatened.
- Mostly nocturnal.
Housing:
- Enclosure size:
- Small species: 20–40 litres
- Large species: 40–80 litres
- Terrestrial: width > height
- Arboreal: height > width
- Substrate: 7–15 cm of coconut coir, peat moss, or pesticide-free soil; avoid sand or fertilised soils.
- Decor: Hides (half-log, cork bark, clay pot); branches for arboreal species.
- Water: Shallow dish, clean and filled daily.
- Temperature: 21–29°C (70–85°F) depending on species.
- Humidity: 50–70% for most terrestrials, 70–80% for rainforest species; mist lightly as needed.
- Lighting: No UVB required; avoid direct sunlight to prevent overheating.
Diet:
- Insects: crickets, roaches, mealworms, superworms.
- Larger species may occasionally eat pinky mice.
- Avoid wild-caught insects that may carry pesticides.
- Feeding schedule: Juveniles 2–3×/week, adults 1–2×/week. Remove uneaten prey within 24 hours.
Molting:
- Tarantulas periodically shed their exoskeleton. Do not feed 1–2 weeks before and after molting.
- During molting: may lie on back or side; this is normal.
Handling:
- Generally discouraged. If necessary, handle gently, supporting the body fully. Avoid sudden movements.
Sexing:
- Males: smaller, thinner, may have tibial hooks or bulbous pedipalps (species-dependent).
- Females: larger, more robust, longer-lived. Confirm via exuviae (shed skin).
Health & Maintenance:
- Signs of good health: active, intact exoskeleton, regular feeding, clear simple eyes.
- Watch for lethargy, poor appetite, damaged exoskeleton, parasites.
- Daily: check water, remove uneaten prey.
- Weekly: spot clean substrate, wipe enclosure.
- Monthly: replace substrate if heavily soiled, clean hides, inspect for mould or mites.
2. Scorpions
Overview:
- Terrestrial arachnids, many from desert or tropical regions.
- Lifespan: 2–8 years, depending on species.
- Mostly nocturnal, sit-and-wait predators.
- Can sting defensively; UK keepers should handle with care or avoid handling.
Housing:
- Enclosure size: 20–40 litres for small species; 40–60 litres for larger species.
- Substrate: 5–10 cm of sand, coconut fibre, or soil mix depending on species.
- Desert species: dry substrate.
- Tropical species: retain some humidity (50–70%).
- Decor: Hides (half logs, cork bark, stones), shallow water dish.
- Temperature: 24–32°C (75–90°F), species-dependent.
- Humidity: Desert species 30–50%, tropical species 60–80%; mist lightly for tropical species.
- Lighting: No UVB required; avoid direct sunlight.
Diet:
- Insects: crickets, roaches, mealworms.
- Feed juveniles 2–3×/week, adults 1–2×/week.
- Remove uneaten prey promptly.
Handling & Safety:
- Handling is generally discouraged. Use tongs or scoop if necessary.
- Be aware that many species can sting; tropical species tend to be more defensive.
Health & Maintenance:
- Signs of good health: active, alert, glossy exoskeleton, regular feeding.
- Watch for lethargy, lack of appetite, or mould in substrate.
- Daily: check water dish.
- Weekly: spot clean substrate, remove waste.
- Monthly: refresh substrate if dirty, clean hides, check for mites.
Conclusion
Tarantulas and scorpions are low-maintenance, long-lived, and fascinating pets. By providing species-appropriate housing, temperature, humidity, diet, and minimal disturbance, they can thrive and display their natural behaviours safely in a UK home.