Mexican Flame Knee Tarantula: 25-Year Lifespan, Venom, and a Frog Roommate #shorts #animalfacts

Added: 2026-06-03

[00:00:00]Knees on fire. That's how the Mexican flame knee got its name. Adult females reach a body length of 7 cm, about 2.7 in, while males stay smaller, around 5.5 cm, 2.1 in. Like all brachipelma, it grows incredibly slowly. It takes four to 5 years just to reach maturity.

[00:00:21]Brachipelma orum is a tarantula with a black body overall. The prooma or sephiloththorax is beige on the edges extending slightly toward the center.

[00:00:31]The opistosoma or abdomen is completely black and covered with dark reddish ericating hairs. Its legs are black with a beige ring at the end of each segment.

[00:00:40]Tarsus, metatarsus, tibia, patella, and femur. The tibia is a red orange color resembling a kind of flame, hence its common name. Its vententral side is entirely black and shiny. It's found only in Mexico's Guerrero and Mitoakan states, mountain forests up to a thousand meters in elevation, dry for much of the year with clay soils where it digs burrows under rocks, logs, and even house walls. Some individuals have moved into areas around fields or meadows because habitat destruction and fragmentation have forced them to adapt to these places where they find prey to feed on. Some live in roadcut embankments, and when those rare violent rains hit, they flee their flooded tunnels. Inside its cholesteray, it carries venom glands, a cocktail of toxins that paralyzes prey, insects, small lizards. In captivity, they eat crickets, roaches, meal worms, superworms, and occasionally newborn mice. For us, a bite is painful, comparable to a beasting, but not life-threatening. Despite the fangs, it's not an aggressive species. When bothered, it's far more likely to turn around and flick urticating hairs from its abdomen. That said, it can be slightly more defensive than cousins like Brachipelma smithy or the curly hair. Lifespan sets it apart. Females can live up to 25 years in captivity, 15 in the wild. Males, a brief 4 to 6 years after reaching adulthood. Truly a long-term companion. And then there's the frog. The burrows, retreats of aphonapelma hensy, poetyltheria species and of course zenus emanis all have been observed to have the small frogs cohabiting with them. This tarantula has been documented sharing its burrow with a tiny frog, Elutha Rodactilus oxidentalis. The only non-microhilid frog known to cohabit with any tarantula. A tiny bodyguard living right in the tunnel of a spider. Mexican flame knee. Slow, stunning, full of surprises.