Breeding Notes
Lasiodora parahybana
Species-specific breeding guidance, seasonal context and practical caveats for experienced keepers.
Species breeding reference
Breeding Notes
Breeding Lasiodora parahybana isn’t the hardest out there, but its size and speed mean it’s not a walk in the park either. Success hinges on getting humidity, warmth, and timing just right, plus a vigilant eye for any signs of trouble. When it works, you’re often rewarded with an impressive clutch and one very protective mum, but things can go awry fast if you miss the cues. Perfect for the keeper who’s already got a few pairings under their belt and fancies a bit of a challenge.
Wild Breeding Season
Breeding in the wild appears to line up with the rainy season in their native range, so you’re probably looking at peak activity towards late spring into summer, when warmth and humidity are both on the rise.
Wild Environmental Triggers
Seasonal rains and a steady bump in humidity seem to be the big triggers in nature—think sudden downpours and moist, balmy nights. Slight temperature increases and fresh substrate on the forest floor signal prime time for courtship.
Native Climate Context
Coming from the Atlantic rainforest of northeastern Brazil, these tarantulas are used to year-round warmth and humidity, with especially muggy conditions during the rainy months. Daytime temperatures usually hang between 22–28°C, and it never gets chilly even at night.
Captive Breeding Window
Your best shot in captivity is to pair them as temperatures and humidity rise—late spring through early autumn in the UK is ideal if you can gently mimic that uptick in warmth and moisture.
Pre-pairing Conditioning
Give both male and female a few weeks of hearty feeding and make sure humidity is a notch higher than normal. You might encourage moults with a slightly damper corner, but don’t go swampy. A mature, freshly moulted female is always a bonus for pairing attempts.
Male Introduction Guidance
Introduce the male carefully, ideally in the evening when both spiders are active but not stressed by heat. Let him approach at his own pace while you keep an eye on proceedings—these big girls can get bossy and hungry, so separate swiftly if things kick off.
Female Readiness Signs
A receptive female will hold a relaxed posture, may drum lightly on the substrate, and won’t charge or posture defensively when the male draws near. If she’s grumpy or ignores him completely, try again in a week after a hearty meal.
Post-pairing Conditions
After a successful introduction, crank humidity just a touch and keep disturbance to a minimum. Feed the female well and keep her comfortable; stress and dryness can swiftly put the brakes on egg sac production.
Sac Timeline
Reports are mixed, but expect the female to produce a sac 4 to 8 weeks after pairing if all’s gone to plan. She’ll often web it up securely and guard it closely.
Incubation Notes
Leave the sac with mum for at least three weeks unless she gets destructive or neglectful, then consider artificial incubation. Keep things warm and gently humid, avoiding direct contact with water.
Expected Sling Count
Known to produce large sacs—anywhere from several hundred up to 2,000 slings if conditions are spot on. Numbers will vary depending on the female’s size and health.
Risks and Cautions
Males can become a post-introduction snack if you’re not careful, so watch closely. Females may sometimes ignore or even destroy the sac, especially if conditions drift from humid and stable. Use caution: this species is big, fast, and not shy about standing its ground if disturbed.
Evidence confidence: Medium
