As temperatures drop across the southern United States, the annual migration of Texas brown tarantulas (Aphonopelma hentzi) is expected to occur. Experts predict that 2024 will see a typical surge in these large arachnids.
Primarily found in Texas and New Mexico, with some extending into Arizona’s Sonoran Desert, these tarantulas make a notable appearance in Colorado. Despite their fearsome reputation, they are generally reclusive, spending most of their time hidden in shelters and emerging only at night to hunt.
From late August to October, male tarantulas leave their hiding spots to search for mates. They can cover distances of up to a kilometer (about half a mile) during this time. After mating, the females produce fertilized egg sacs containing over a thousand eggs, which incubate for 45 to 60 days.
Though often seen as a seasonal spectacle, these tarantulas can cause unease among those who fear spiders. They may exhibit defensive behavior if threatened, such as showing their fangs or shedding irritating bristles.
If a tarantula ends up indoors, it is best to gently relocate it outside using a bowl and card. Male tarantulas have a short lifespan of around 10 years, making it essential for them to find mates before they die.
In towns like La Junta, Colorado, the tarantula migration is celebrated with events like the “Tarantula Mardi Gras.” However, with declining spider populations due to climate change, habitat loss, and collection practices, increased awareness and conservation efforts are needed.