Buying a tarantula from a classified listing—Kijiji, Facebook Marketplace, a hobbyist forum—is often the smartest move for an experienced keeper. You get an animal with a known history, past the fragile sling stage, and usually at a better price than a breeder charges for the same species. But that calculus only holds if you know what to look for when you arrive.
Tarantulas are quiet animals that mask problems well. A stressed, dehydrated, or pre-moult T can look completely normal to someone who hasn’t handled hundreds of them. These checks won’t take long—most happen in the first 30 seconds of actually seeing the animal—but they’re the difference between a healthy long-term companion and a tarantula that’s in crisis within the week.
We keep Katara, a Texas Brown Tarantula, as an ambassador here at Toronto Reptiles. She’s been with us long enough that we know her patterns, her tell-tale posture when she’s approaching a moult, and exactly how she carries herself when she’s in peak condition. That baseline knowledge is what we’re trying to give you before you make the drive.
Key Takeaways
- Abdomen condition is the single most important visual check — a plump, rounded abdomen signals hydration and health; a shrivelled, raisin-shaped abdomen is a serious warning sign
- Never buy a tarantula within two to three weeks of a moult — the new exoskeleton hasn’t hardened yet, and transport stress during this window can be fatal
- Ask for a feeding log — a T that hasn’t eaten in months is either pre-moult (normal) or has a problem; the abdomen tells you which
- Leg and fang integrity matters — missing legs can regrow over subsequent moults, but they tell you something about the animal’s history and enclosure
- The enclosure check matters as much as the animal check — a well-maintained setup signals a keeper who understood what they were doing
The Single Most Important Check: Abdomen Condition
What a Healthy Abdomen Looks Like
A healthy tarantula’s abdomen — the opisthosoma, the large rear section — should be rounded and plump, ideally at least two-thirds the size of the carapace or larger. It has a slight sheen, and when viewed from the side it curves gently downward. In terrestrial species like the Texas Brown, the Mexican Red Knee, or the Chaco Golden Knee, you’re looking for an abdomen that looks almost balloon-like relative to the front body.
Red Flags to Watch For
A shrivelled, raisin-shaped abdomen means the tarantula is significantly dehydrated. This is serious. While a well-cared-for adult can go months without eating and remain healthy, dehydration develops when a T isn’t drinking or its environment is chronically too dry. An abdomen that looks like a deflated balloon means the previous keeper wasn’t providing adequate moisture — and depending on how long this has been going on, the animal may need extended recovery before it’s stable.
A very small abdomen relative to the carapace can also indicate long-term underfeeding, or something interfering with the tarantula’s ability to process food. Either way, it’s a reason to ask a lot more questions before you commit.
The reverse situation — an extremely distended, stretched-looking abdomen — occasionally indicates internal issues. Context matters: an animal that ate a large prey item recently will simply look fuller than usual, and that’s fine. The abdomen that looks stretched and hard or unusually angular is more worth noting.
Moult Timing: The Rule That Could Save the Animal’s Life
Before you agree to purchase any tarantula, ask the seller: When did she last moult?
Freshly moulted tarantulas — within two to three weeks of shedding their exoskeleton — are in a fragile state. The new exoskeleton, including the fangs, hasn’t fully hardened through a process called sclerotization. Transport stress during this window is significantly more dangerous than at any other point in the animal’s cycle. A T that isn’t fully hardened can die from something as minor as a fall of a few centimetres or an overly rough journey.
Recognising Pre-Moult
A tarantula approaching a moult may be showing signs that an inexperienced seller interprets as illness or personality. Knowing the difference protects you from buying at the wrong moment — or from passing up a healthy animal because you misread the signs.
- Refusing food for weeks or months — one of the clearest pre-moult indicators in most species
- Abdominal darkening — the skin of the abdomen takes on a darker, sometimes charcoal colouration as the new exoskeleton forms underneath
- Lethargy and extended stationary periods in the hide
- Webbing over the burrow entrance or a flat moult mat laid on the substrate surface
If a seller says their T “hasn’t eaten in months and they’re not sure what’s wrong,” look at the abdomen. A darkened, rounded abdomen alongside anorexia is classic pre-moult — nothing is wrong. A pale, shrinking, visibly smaller abdomen alongside anorexia is more concerning and warrants more investigation. A clearly pre-moult tarantula should be left alone to complete the process before you move it.
Checking Legs, Fangs, and Feet
Leg Count and Missing Limbs
A healthy tarantula has eight legs plus two pedipalps — shorter appendages near the mouth that aren’t legs but are sometimes counted by new keepers. Confirm all eight legs are present and intact. If one is missing or partially present, ask how it happened.
Missing legs aren’t automatically a dealbreaker. Tarantulas lose legs through escape attempts, failed moults, or getting stuck in a hide — it happens to well-cared-for animals. The good news: legs regrow over one or two moults in most species, often fully restored. What a missing leg does tell you is that something in the enclosure caused it, and it’s worth understanding what.
Stuck Shed on Leg Tips
Look closely at the tarsal pads — the tips of the feet. Stuck shed that remains on the leg tips after a moult means the humidity was inconsistent at the time of moulting. Over several moults, this can cause constriction and eventual loss of the affected limb. It’s a manageable problem, but it tells you the environment wasn’t quite right and you’ll need to correct it.
Fang Condition
The chelicerae — the mouthparts — and fangs should be clean and symmetrical. Post-moult fangs begin pale or almost translucent and darken to black or deep brown as they harden. A fully hardened, healthy set of fangs should be uniformly dark and held naturally. Damage, asymmetry, or an unusual angle can indicate past trauma, though many such issues resolve at the next moult.
Posture and Movement
The Death Curl
If a tarantula is curled into a tight ball — legs tucked underneath its body, abdomen folded forward — this is called the death curl, and it means the animal is in serious distress. It indicates severe dehydration, physical trauma, or neurological impairment. Do not purchase a tarantula in this position. It’s not sleeping, it’s not defensive — it’s failing.
What Normal Movement Looks Like
Ask the seller to coax the T out so you can observe it walking. Movement should be coordinated and deliberate. Legs should be relaxed and splayed, not pulled tight beneath the body. Some species — old world Ts in particular — move in short, fast bursts; new world species tend to be slower and more measured.
Trembling, visible leg spasms, or uncoordinated movement (“wobbly” behaviour) can indicate neurological problems, exposure to pesticides, or — in specific spider-morph tarantula genetics — a heritable condition. It’s not always definitive, but it’s worth noting and asking about.
Enclosure Check: What the Setup Tells You
Ask for photos of the enclosure before you commit to the drive. When you arrive, look at the setup before you look at the animal — a well-maintained enclosure tells you a lot about whether the keeper understood what they were doing.
| What to check | What you’re looking for | Red flag |
|---|---|---|
| Substrate depth | 3–4× the T’s legspan for terrestrial species; 30+ cm for burrowing species | Shallow, dry substrate with no burrowing opportunity |
| Water access | Clean water dish appropriate to the T’s size; overflow area moist for tropical species | No dish, or dish fouled with substrate or dead feeders |
| Temperature | Room temperature is fine for most species: 22–28°C (72–82°F) | Heat lamps, heat cables — tarantulas don’t need supplemental heat; these dry them out |
| Ventilation | Cross-flow vents at top and bottom of the enclosure | Sealed enclosure with no airflow; condensation on walls with no moisture gradient |
| Cohabitation | Single occupant | Any cohabitation — tarantulas are solitary predators; any pairing ends in cannibalism |
| Feeder remains | Enclosure is clean; old moults removed | Dried-out feeders left inside, old moult debris accumulating |
Questions to Ask Before You Go
Don’t make the drive without getting answers to these. A seller who can answer most of them clearly has been paying attention to their animal.
- What species is it, and how was it sexed? Female tarantulas of most long-lived species can reach 20–30+ years; males typically live 3–7 years once mature. Sex matters enormously for commitment and pricing.
- When did she last moult? If it was within the past three weeks, offer to come back in a month.
- When did she last eat, and what feeders does she take? Knowing the feeding history tells you what to expect and what to stock.
- Has she ever refused food for an extended period outside of pre-moult? Occasional fasting is normal; extended unexplained anorexia is not.
- How long have they had her, and where did she come from originally? Ideally captive-bred; wild-caught animals (especially CITES-listed species) carry import paperwork requirements and may carry parasites.
- Is she handleable, or defensive? This is species-dependent — some Ts are never truly handleable and that’s fine — but knowing upfront helps you manage expectations.
- Can you see a recent moult for sexing? Many sellers keep the last moult specifically for this purpose.
Species Quick-Reference for Common Ontario Purchases
| Species | Common name | Female lifespan | Temperament | Notes |
|---|---|---|---|---|
| Grammostola pulchripes | Chaco Golden Knee | 20–25 years | Very calm | Ideal beginner species; slow grower |
| Brachypelma hamorii | Mexican Red Knee | 25–30 years | Calm, slow | CITES II — verify papers on wild-caught |
| Grammostola rosea | Chilean Rose | 20+ years | Variable | Famous for unexplained fasting; very common in rescue |
| Avicularia avicularia | Pink Toe | 10–12 years | Fast, arboreal | Needs excellent ventilation; prone to dehydration |
| Chromatopelma cyaneopubescens | Green Bottle Blue | 12–14 years | Fast, defensive | Stunning; not recommended for handling |
| Brachypelma auratum | Mexican Flame Knee | 20+ years | Docile | Often confused with B. hamorii |
| Aphonopelma chalcodes | Desert Blonde | 25–30 years | Calm, slow | North American native; excellent beginner T |
Transport to Your Home
Tarantulas should be transported in a small, secure, ventilated container — a deli cup with air holes and a small amount of slightly damp paper towel works well for most species. Keep it upright. Avoid leaving the animal in a hot car; temperatures above 30°C (86°F) are dangerous for most species.
In Ontario winters, pre-warm the car before the T goes in, and consider an insulated bag with a hand warmer kept at distance from the container. A brief temperature drop isn’t usually fatal for a healthy adult, but a prolonged cold exposure is. The key is avoiding sharp swings.
Consider Adopting Instead
We periodically have tarantulas available through our rescue and rehoming network — adults with known histories, exactly the animals this guide prepares you to evaluate. If you’re open to adoption, it’s worth checking what’s currently available before committing to a classified purchase.
You can also review our complete guide to buying reptiles safely in Ontario, which covers classified listings, red flags, and questions to ask across all species.
Frequently Asked Questions
How do I know if a tarantula is male or female?
The most reliable method is examining the last moult under magnification, looking for the spermathecae — small pouches visible between the first book lung slits on the inside of the abdomen. Mature males also develop tibial hooks (spurs on the forelegs) and bulbous pedipalp tips. Many sellers retain the last moult specifically for sexing purposes. If they don’t have it and the animal is sexually mature, you’re relying on secondary indicators, which are less reliable.
Is it safe to handle a tarantula I just brought home?
Give any newly acquired tarantula at least two weeks — ideally four — to settle before attempting handling. The stress of transport and a new environment is real, and an acclimating T is more likely to flick urticating hairs or bite defensively than it will be once it’s established. Let it settle, establish a burrow or web its hide, and start eating again before you introduce your hand.
What if my tarantula won’t eat after I bring it home?
Food refusal after a move is completely normal — most tarantulas will ignore prey for two to six weeks while they adjust. Offer a small feeder every 7 to 10 days, remove it if uneaten after 24 hours, and wait. If she’s not eating after two months, check the abdomen size and review the environment: temperatures (most species want 22–28°C), humidity levels, and photoperiod. For our complete breakdown of reptile and invertebrate diet, see our guide to feeding your reptile.
My tarantula’s abdomen looks smaller than when I got her — should I be worried?
A slight decrease in abdomen size after the move is normal, especially if she’s been refusing food during the adjustment period. Provide a fresh water dish and continue offering prey items. She should fill back out quickly once she’s eating again. If the abdomen continues shrinking despite eating and access to water, that warrants a closer look at the environment.
Can I house two tarantulas together?
No. All tarantulas are obligate solitary predators. Any cohabitation will end in cannibalism — usually rapidly. Even species occasionally and incorrectly marketed as “communal” should be housed individually. One enclosure per animal, always.
What’s the difference between new world and old world tarantulas for a buyer?
New world species (Americas) typically have urticating hairs on their abdomen that they flick as a primary defence — irritating to skin and especially eyes, but generally not medically significant. They tend to be slower and more docile. Old world species (Africa, Asia, Middle East) have no urticating hairs, are often significantly faster and more defensive, and are more likely to bite when threatened. Old world bites are generally more medically significant, though still rarely dangerous to healthy adults. For buyers new to tarantulas, new world species have a more forgiving learning curve.
Do I need a permit to keep a tarantula in Ontario?
Most commonly kept tarantula species do not require a provincial permit in Ontario. However, CITES-listed species — including Brachypelma hamorii (Mexican Red Knee) and Brachypelma auratum (Mexican Flame Knee) — require documentation proving the animal was legally acquired. If you’re purchasing one of these species, ask for the paperwork. Wild-caught CITES animals without documentation are a legal problem you don’t want to inherit.
Before you bring any tarantula home, make sure the setup is ready. Our complete guide to tarantula care covers enclosure builds, humidity and temperature by species type, feeding schedules, and everything you need for a long, healthy partnership with your new T.