Breeding Notes
Melopoeus lividus
Species-specific breeding guidance, seasonal context and practical caveats for experienced keepers.
Species breeding reference
Breeding Notes
Breeding Melopoeus lividus is not for the faint-hearted. These fossorial beauties need spot-on humidity, deep substrate, and a calm, naturalistic environment to have a go at reproduction. Documented attempts show that mimicking Thailand’s warm, wet season cues the best response, but patience is key and losses are possible. If you fancy a challenge and thrive on tunnel-view drama, this is a rewarding—if tricky—project for experienced hands only.
Wild Breeding Season
Exact wild breeding season for Melopoeus lividus isn’t firmly pinned down, but this species hails from Thailand’s monsoonal forests, so breeding activity likely falls in line with the tropical rainy season when food is plentiful and humidity soars.
Wild Environmental Triggers
Heavy seasonal rains, high humidity, and stable warm temperatures (often 24–28°C) seem to cue reproductive activity in their native forests—a classic monsoonal pattern for Southeast Asian fossorials.
Native Climate Context
Think balmy nights, hot days, and proper muggy air for much of the year—exactly what you’d expect from Southeast Asia’s tropical monsoon forests. There’s a marked wet season where humidity approaches 80%, so these spiders are primed for moisture-rich digs.
Captive Breeding Window
Most successful captive breeding attempts are timed to mirror the rainy season in Thailand, so late spring to early autumn is a fair bet. Aim for increased humidity and a subtle temperature bump during this window.
Pre-pairing Conditioning
Both male and female should be well-fed and hydrated before any introductions, with the female having access to a secure, deep burrow. A gentle increase in humidity and making conditions resemble the wet season (without waterlogging) helps ‘set the mood.’
Male Introduction Guidance
Pairing can be risky—use a barrier to gauge the female’s mood first, and always introduce the male near the burrow entrance. Some keepers find success pairing at dusk, gently misting the enclosure beforehand to mimic natural cues. Watch closely, and be ready to intervene if the female shows aggression.
Female Readiness Signs
A receptive female will often linger near her burrow entrance and may drum or show less aggression to the male’s advances. If she’s staying deep in her burrow or striking at the barrier, best leave it for another day.
Post-pairing Conditions
After a successful introduction, remove the male promptly for his own safety. Maintain high humidity and stable warmth, providing lots of prey if the female isn’t in premoult.
Sac Timeline
Exact timing is variable and not robustly documented, but egg sacs in this genus often appear four to eight weeks post-mating. Wild-born timing may be longer—patience is crucial here.
Incubation Notes
Cobalt Blue sacs are tightly guarded, embedded deep in the female’s burrow where humidity stays high and disturbance is minimal. Ideally, let the female care for the sac unless there are clear signs of neglect or predation.
Expected Sling Count
Reports vary widely, but you might expect anywhere from 70 to 200 slings per sac, depending on the female’s condition and environmental stability.
Risks and Cautions
Pairing can end badly for the male if you aren’t vigilant. Melopoeus lividus are exceptionally defensive and secretive, retreating or attacking without much warning. Premature failure of egg sacs is not unusual, often due to unstable humidity or stress. Slings are extremely fast and prone to burrowing—be prepared for the challenge of rehousing tiny, bolty offspring.
Evidence confidence: Medium
