Origin And Natural Habitat
The Amazon basin of Brazil is the home of Bumba horrida, a species tied to the moist lowland forest and forest-edge environments of Amazonian Brazil — a vast region of tropical rainforest, gallery forest along river systems, and the seasonally flooded terrain that characterises much of the upper and central Amazon. The climate is genuinely tropical — warm throughout the year, with the seasonal alternation between a rainy period and a several-months-long dry period that the species has adapted to physiologically. Keeper experience confirms that slings provided with deep substrate immediately excavate complex tunnel systems straight down to the bottom of the enclosure — a strongly fossorial instinct that reflects the deep, moist Amazon forest floor soils where the species naturally burrows. During the dry season the same keeper documented slings burying themselves completely and sealing burrow entrances — a natural dormancy response to the seasonal dry period that should be left completely undisturbed in captivity.
The species carries a notable taxonomic history worth understanding before anything else. It was first described as Iracema cabocla in 2000, moved through Maraca cabocla in 2005, then Bumba cabocla in 2014, before being reclassified as Bumba horrida — the name it currently carries. Most keeper care sheets and vendor listings still use the cabocla name, and keepers searching for care information will find more resources under that former name than under horrida. Both names refer to the same animal.
Scientific Classification
The naming journey of this species is one of the more complex in recent Brazilian theraphosid taxonomy. Originally described as Iracema cabocla by Pérez-Miles in 2000, it moved to Maraca cabocla in 2005 and then to Bumba cabocla when Pérez-Miles, Bonaldo, and Miglio erected the genus Bumba in 2014. The current placement as Bumba horrida reflects the most recent revision establishing this as the valid name. The former name Bumba cabocla is derived from the Portuguese feminine word cabocla, referring to women of the Amazonic forests — a culturally respectful name that many keepers have come to know this spider by. The species name horrida means “dreadful” or “bristly” in Latin — a designation that the species has been rather unfairly handed, given that its actual temperament is among the gentlest of any South American terrestrial. The World Spider Catalog and iNaturalist confirm B. horrida as the current valid name. Full classification: Kingdom Animalia, Phylum Arthropoda, Class Arachnida, Order Araneae, Infraorder Mygalomorphae, Family Theraphosidae, Genus Bumba, Species B. horrida Pérez-Miles, Bonaldo & Miglio, 2014.
Species Overview
Bumba horrida arrived in the hobby as a rarely offered tarantula fairly new to the captive trade and has developed a devoted following among keepers who appreciate its combination of visual distinctiveness, genuine docility, and the characteristic shift from reclusive sling to openly displayed adult that makes it progressively more rewarding to keep. The strikingly orange carapace and shiny black abdomen and legs are the visual hook, but the temperament is what earns long-term keeper loyalty — rarely threat posing or kicking hairs, gentle even by New World terrestrial standards, and reliably visible above ground as an adult in a way that makes the extraordinary colour contrast regularly accessible. Intermediate experience is appropriate primarily because of the humidity requirements and the depth of substrate needed for a species that genuinely wants to burrow — the temperament itself is beginner-appropriate.
Appearance And Size
The colour development through life stages is one of the more interesting journeys in the hobby’s South American terrestrial species. As spiderlings, the species is fairly uniform brown except for a red to orange carapace — the red head is present from the beginning but the contrast with the body is less dramatic at small size. As the spider matures, the carapace brightens progressively to a deep crimson red while the rest of the body darkens to jet black — the contrast becoming more vivid with each successive moult until the adult colouration is achieved. The carapace is smooth and appears almost hairless, with a clean, glossy quality that makes the red colour appear particularly saturated — more like polished lacquer than the dense-setae carapace of Brachypelma species. The black of the abdomen and legs carries a velvet sheen that makes the contrast between carapace and body particularly striking in good light.
Adult legspan reaches 4 to 5 inches — a compact to medium-sized terrestrial that does not need the large enclosure footprint of the biggest South American species. Female lifespan reaches 12 to 15 years, with males living 3 to 5 years. Growth rate is medium — faster than Brachypelma but not the explosive growth pace of the largest South American species.
Housing
A terrestrial enclosure with floor space and substrate depth as joint priorities — the surface area should be no less than two times the spider’s diagonal leg span in one direction and three times in the other, with height kept to twice the legspan maximum to protect a terrestrial adult from fall injury. The substrate depth matters enormously for this species — four or more inches for adults, with keeper experience confirming that slings given adequate depth immediately excavate full tunnel systems to the bottom of the enclosure. The species is a genuine burrower rather than an opportunistic one, and the enclosure must accommodate that. A latching lid is standard. Our best tarantula enclosure guide covers terrestrial formats appropriate for medium-sized Amazonian Brazilian fossorial species, and our best tarantula sling enclosure guide covers the smaller formats for juveniles.
Enclosure’s Decorations
A pre-formed starter burrow angled into the substrate at one end gives the spider an immediate starting point, though keeper experience suggests the species will excavate its own tunnel system rapidly if given adequate substrate depth regardless of what structure is provided above ground. Cork bark or additional decoration at substrate level gives the spider surface retreat options for the periods when it chooses to be above ground. A shallow water dish at the opposite end provides hydration access. Our best tarantula hide guide covers appropriate cork pieces for Amazonian fossorial species.
Substrate
Four to five inches of moisture-retaining substrate with good structural integrity for tunnel construction. ABG mix, coconut coir, and similar organic blends all work well — the priority is a substrate that holds burrow shape and retains some moisture through its depth without becoming waterlogged at the surface. Keeper experience recommends moistening part of the substrate periodically by carefully pouring water down the sides rather than surface misting — allowing the lower layers to maintain moisture while the surface remains drier. The seasonal wet-dry character of the Amazon basin suggests cycling moisture — wetter during feeding seasons and allowed to dry somewhat during the natural dry period — is more physiologically appropriate than maintaining constant high moisture throughout. Our best tarantula substrate guide covers moisture-retaining blends appropriate for Amazonian terrestrial fossorial species.
Water And Humidity
A shallow water dish at all times, refreshed every two to three days. Humidity of 65 to 75 percent is appropriate for the Amazonian rainforest habitat — moderately high, reflecting the tropical character of the range without requiring the continuous saturation of the most moisture-dependent species. A damp area of the habitat rather than a humidifier achieves appropriate moisture without the stagnant air risk that mechanical humidifiers can create. A hygrometer confirms actual ambient conditions, and a misting bottle handles targeted moisture additions to the substrate sides.
Heating And Temperature
The Amazonian Brazil habitat maintains consistently warm tropical temperatures year-round. A captive range of 72 to 82°F suits this species well, with keeper experience documenting temperatures of 72 to 76°F in winter and 75 to 80°F in summer producing healthy growth. Warmer temperatures within the appropriate range produce faster growth and more frequent moults. Most temperate indoor environments are appropriate without supplemental heat for much of the year. A side-mounted heat mat controlled by a thermostat handles periods when ambient temperatures drop consistently below 70°F. A thermometer at substrate level confirms actual enclosure conditions.
Diet And Nutrition
Crickets, dubia roaches, and other appropriately sized invertebrates weekly for adults, reflecting the warmer temperatures and moderate metabolic pace of this Amazonian species. Juveniles every five to seven days. The medium growth rate means consistent feeding through the juvenile phase helps achieve adult colouration in reasonable time. Remove uneaten prey within 24 hours, and leave the spider completely undisturbed when it seals its burrow before a moult or during the dry season dormancy period. Our best tarantula food guide covers feeder options and sizing for medium-sized Amazonian terrestrial fossorial species.
Compatibility
Solitary only. Captive breeding has become progressively more established as the species has been in the hobby longer, and multiple vendors now carry captive-bred stock — a meaningful improvement from the early hobby days when it was rarely offered.
Behavior And Temperament
Generally docile and rarely threat posing or kicking urticating hairs — a temperament that sits at the calm end of the South American terrestrial spectrum and that makes routine maintenance and observation a relaxed activity rather than a deliberate exercise in caution. Fairly skittish as a youngster but stays out in the open as it gets bigger — the developmental shift from reclusive burrowing sling to visible surface-retreating adult is one of the most rewarding aspects of keeping this species, culminating in an adult that displays the extraordinary red-and-black colouration regularly and reliably. The excellent temperament and incredible display quality together make this species genuinely compelling for any keeper who has moved through the most basic beginner species and is looking for something more visually distinctive.
Handling
Possible with care given the docile adult temperament — the gentle disposition and open display behaviour of adults make this a manageable handling experience for keepers who choose it. Standard floor-level protocol with slow movements applies. The glossy crimson carapace against jet-black legs at close range is visually striking and rewarding. Venom is medically insignificant to healthy humans as a New World species.
Health And Lifespan
Females live 12 to 15 years in captivity. Males live 3 to 5 years. The species is hardy within appropriate warm, moderately humid Amazonian conditions. The primary health considerations are adequate substrate depth for the burrowing behaviour that defines this species at all life stages, appropriate moisture management through the seasonal dry period when natural dormancy is normal, and the warm temperatures that support the metabolism of a tropical Amazonian species. Our tarantula dehydration article covers identification and recovery for dehydration concerns in moderately humidity-dependent Amazonian terrestrial species.
Price
Available in captive-bred form from multiple specialist vendors with good regularity given the increasingly established captive breeding. Josh’s Frogs, Fear Not Tarantulas, and Juice’s Arthropods all stock this species periodically. Slings typically sell for $20 to $50 USD — accessible pricing that reflects the growing captive breeding volume. Juveniles range from $40 to $80. Confirmed adult females command $80 to $150 depending on size and source. Source captive-bred specimens only. Everything needed to set this species up correctly and watch it develop from brown sling to crimson-headed adult is on our best tarantula products page.