Psalmopoeus reduncus — the Costa Rican Orange Mouth Tarantula — is one of the most visually distinctive members of the Psalmopoeus genus. Named for its striking vivid orange chelicerae (fang bases) that contrast dramatically against its dark body, it is a fast-growing, bold arboreal species native to Costa Rica and Panama. Like all Psalmopoeus, it carries no urticating hairs — relying entirely on speed and venom as its defences, and demanding the same Old World-level respect despite its New World classification.
QUICK ANSWER — WHAT DOES PSALMOPOEUS REDUNCUS NEED?
P. reduncus requires a tall arboreal enclosure (minimum 18"H × 12"W × 12"D), temperatures of 76–84°F, humidity of 65–78%, cork bark or plant cover in the upper third, a shallow water dish, and prey every 10–14 days for adults. Intermediate keepers and above. No urticating hairs — tongs-only protocol required.
- Enclosure: Tall arboreal, front-opening essential, 18" minimum height
- Temperature: 76–84°F (24–29°C) daytime
- Humidity: 65–78% RH with lightly moist substrate base
- Feeding: Every 10–14 days (adults); 4–5 days (slings)
- Experience level: Intermediate and above
- Urticating hairs: None — defends with speed and venom only
Species Overview & Natural Habitat
Psalmopoeus reduncus is native to Costa Rica and Panama, where it inhabits humid tropical forests — living arboreally in tree hollows, bark crevices, and dense vegetation. Its environment is warm and consistently humid, reflected in care parameters that sit comfortably between P. irminia and P. cambridgei on the humidity spectrum.
What immediately sets P. reduncus apart from other Psalmopoeus is its namesake feature: the vivid orange chelicerae that flash during feeding strikes and threat displays. Against the spider's dark brown-grey body, the orange fangs are unmistakable and make every feeding interaction a visual event. The orange colouration appears in slings and intensifies with each successive molt toward adulthood.
Growth rate is fast, consistent with the genus — slings reach adult size in approximately 2–3 years under correct conditions. It is a rewarding species that grows quickly, feeds eagerly, and displays its distinctive colouration from day one.
Is Psalmopoeus reduncus Right for You?
IMPORTANT — NO URTICATING HAIRS
P. reduncus is a New World tarantula with Old World defensive behaviour. It has no urticating hairs and will not flick as a warning — its only defences are speed and a willingness to bite. The orange fangs are a visual cue: this spider uses them readily and with minimal provocation. Tongs-only maintenance is non-negotiable.
Good choice if you: have prior tarantula experience, appreciate visually distinctive species, want a fast-growing display arboreal, and are comfortable with tong-only husbandry protocols.
Wrong choice if you: are a first-time keeper, assumed New World means handleable, or want a hands-on species.
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View Psalmopoeus reduncus — Shop Now →What Enclosure Does Psalmopoeus reduncus Need?
A strict arboreal requiring height over floor space. P. reduncus will anchor its retreat in the upper third of the enclosure and rarely descend. Front-opening is essential — this species is fast and reactive, and top-access creates unnecessary risk.
| Stage | Minimum enclosure | Notes |
|---|---|---|
| Sling (under 1") | 6–8 oz deli cup | Cross-ventilated; cork flat or leaf litter |
| Juvenile (1–3") | 6"H × 4"W × 4"D | Cork flat or tube, upper portion |
| Sub-adult (3–4") | 12"H × 8"W × 8"D | Begin adult husbandry protocol |
| Adult (4"+) | 18"H × 12"W × 12"D | Front-opening essential |
How to Set Up a Psalmopoeus reduncus Enclosure (Step by Step)
- Add 3–4 inches of substrate — coconut fibre, organic topsoil, or peat/coco mix. Lightly moisten the base layer.
- Position cork bark or artificial plants in the upper third. P. reduncus will anchor its retreat here within 24–48 hours and lay down impressive silk quickly.
- Add mid-enclosure decor — cholla wood or a secondary cork piece for intermediate resting.
- Place a shallow water dish in the lower third. Change weekly.
- Ensure cross-ventilation — two opposing mesh panels to balance airflow with humidity retention.
- Allow 24–48 hours before introduction and keep lighting low — settles fastest in dim conditions.
Temperature & Humidity Requirements for Psalmopoeus reduncus
| Parameter | Ideal | Acceptable | Avoid |
|---|---|---|---|
| Daytime temperature | 76–84°F (24–29°C) | 72–86°F | Below 68°F / above 88°F |
| Night temperature | 70–76°F (21–24°C) | 68–78°F | Sustained below 65°F |
| Ambient humidity | 65–78% RH | 60–82% RH | Consistently below 55% |
| Substrate (base) | Lightly moist | Slightly damp | Bone dry or waterlogged |
| Misting frequency | One corner every 7–10 days | Every 5–14 days | Daily misting (mite risk) |
How to Feed Psalmopoeus reduncus
P. reduncus is a confident, enthusiastic feeder — feeding strikes are fast and decisive, making the orange chelicerae highly visible during prey capture. Prey refusal outside pre-molt is usually a husbandry signal; check temperature and humidity first.
| Stage | Prey item | Frequency |
|---|---|---|
| Sling | Fruit flies, pinhead crickets (pre-killed) | Every 4–5 days |
| Juvenile | Small crickets, small dubia roaches | Every 5–7 days |
| Sub-adult | Medium crickets, medium dubia | Every 7–10 days |
| Adult | Adult dubia roaches, adult crickets | Every 10–14 days |
| Pre-molt / Post-molt | None — remove all prey | Resume 14+ days post-molt |
CRITICAL — NEVER LEAVE LIVE PREY UNATTENDED
No urticating hairs means no passive defence during pre-molt or post-molt vulnerability. Remove all uneaten prey within 24 hours. Never introduce prey while a molt is in progress or within 14 days of completion.
Sling and Juvenile Psalmopoeus reduncus Care
Slings display the orange chelicerae from their earliest instars — one of the most exciting aspects of raising this species from sling. Keep in cross-ventilated deli cups with a cork flat or artificial leaf as an arboreal anchor. Pre-kill all prey. Growth is fast; expect frequent rehousing through the juvenile stage. Orange colouration deepens noticeably with each successive molt.
Molting — What to Expect
Pre-molt signs: prey refusal lasting 2–4+ weeks, abdomen darkening, increased silk around the retreat, retreat sealed, lethargy.
During molt: Molts on its back inside or near the retreat. Do not disturb. 30 minutes to several hours depending on size.
Post-molt: Wait 14+ days before feeding. The orange chelicerae will appear brighter immediately post-molt and deepen as the exoskeleton fully hardens. The exuvia can be sexed under magnification.
Handling & Venom — The Honest Guide
Psalmopoeus reduncus should not be handled. The orange mouth is not an invitation — it is a warning. This species has no urticating hairs, bites readily with minimal provocation, and possesses medically significant venom. Bite reports from Psalmopoeus species describe intense localised pain, muscle cramping, and systemic symptoms. Tongs only. Locate the spider before every enclosure opening without exception.
Common Health Problems
| Issue | Signs | Action |
|---|---|---|
| Dehydration | Shrunken, wrinkled abdomen | Refill water dish; mist substrate corner |
| Dysecdysis | Incomplete shed, limbs stuck | Raise humidity; mist enclosure walls lightly |
| Prey injury | Wounds on abdomen or legs | Remove prey; enforce 24hr removal rule always |
| Chronic stress | Constant movement, glass surfing | Add more cover; raise retreat anchor point |
| Substrate mites | Tiny specks in substrate | Full enclosure clean; reduce misting frequency |
Frequently Asked Questions About Psalmopoeus reduncus
How big does Psalmopoeus reduncus get?
Adult females reach 5–6 inches DLS. Males are smaller at 4–5 inches and mature in 2–3 years from sling.
Why are the fangs orange?
The vivid orange colouration of the chelicerae (fang bases) is the species' most distinctive feature and the source of its common name. Present from early sling stages and intensifying with each molt, the orange colouration makes every feeding strike and threat display visually unmistakable.
How does P. reduncus compare to P. irminia and P. cambridgei?
All three lack urticating hairs and share similar care profiles. P. reduncus sits between irminia and cambridgei on the humidity scale (65–78% RH). Most immediately distinguished by the orange chelicerae. Size is similar to P. irminia at 5–6 inches, smaller than cambridgei.
Is Psalmopoeus reduncus a good beginner tarantula?
No. No urticating hairs, confident defensive behaviour, and medically significant venom make this an intermediate-and-above species regardless of its New World classification.
How fast does Psalmopoeus reduncus grow?
Fast — consistent with the genus. Adult size from sling in approximately 2–3 years with regular feeding at correct temperatures.
Is Psalmopoeus reduncus legal in the US?
Legal in most US states with no CITES restrictions. Always verify local state and county regulations before acquiring.
Field Life Pets · Captive Bred · Ships Lower 48
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Every P. reduncus we sell is captive bred, established on feeders, and ready for an experienced home. Fast grower, unmistakable display, ships to all lower 48 states. Only 5 available — live arrival guaranteed.
Get Your Psalmopoeus reduncus →Written by FLPD · Updated June 2026. For informational use only. Verify local legality before acquiring any exotic tarantula.