It carves deep burrows into soil banks to keep it protected from predators and enables it to ambush passing prey. The burrow is typically located in or not far from vegetation. It has a single entrance with a tunnel leading to one or two chambers.
The entrance is just slightly larger than the body size of the spider. The tunnel, usually about three times the tarantula’s leg span in length, leads to a chamber which is large enough for the spider to safely molt in. Further down the burrow, via a shorter tunnel is a larger chamber located where the spider will rest and eat its prey. When the tarantula needs privacy, (when molting or laying eggs), the entrance is sealed with silk that is sometimes covered with soil and leaves. The females spend the majority of their lives in their burrows.
Although usually peaceful, when threatened, this tarantula species will rear up to display its fangs and the bristles on its abdomen. By rubbing its back legs, hair can be flipped as a defense. These ”urticating” hairs are barbed and in contact with soft tissue they dig in and cause an irritation. It is not venomous to humans and is considered extremely docile, though, as with all tarantulas, allergies may intensify with any bite. It is nocturnal and solitary.
Two claws on each foot enable the spider to grip and climb up slippery surfaces. Palps – a pair of sensory appendages – on the end of the legs allow the spider to smell, taste, and feel. Eight eyes positioned around the head enable it to see both forward and backwards. However, it does not have great vision and instead relies on its leg hairs for guidance.
Spiders do not have ears for hearing, but instead have a very well-developed ability to sense vibrations, both airborne and those transmitted through the surface on which they are standing. This sensory ability is sited in a number of different receptors on their body, but especially on the legs.
During courtship, the male approaches a female shelter cautiously, tapping and vibrating his legs. This lures the female out of her burrow. Once out, the male lunges forward to using his hooks to hold the females chelicerae and pushes her into an almost upright position. Before copulation the male takes up into his palps sperm that he has deposited on a specially spun sperm web. The sperm is then implanted in the female’s storage organs and may remain there for some time.
Females lay several hundred eggs which she covers with a sticky liquid containing the sperm. The eggs are wrapped in silk and carried between the mother’s fangs. Eggs hatch between one and a half and two and a half months. Spiderlings are guarded for several weeks. Typically, the male will die within weeks of mating.
This species of tarantula grows very slowly and matures relatively late. Males reach sexual maturity at an age of four to five years. Females mature two to three years later than males, a factor which would prevent inbreeding in the wild. In captivity, with optimal conditions, these spiders may mature at a younger age than their wild counterparts.
|Did YOU Know?|
|Female red-kneed tarantulas are thought to be one of the most long lived tarantulas.|
|Length:||Up to 5.5 inches long|
|Average Lifespan:||Females 30 years; Males 5-6 years|
|Wild Diet:||Small invertebrates such as crickets, roaches, grasshoppers and small rodents|
|Predators:||Birds, moths, lizards, and other insect eaters.|
|Where at the Zoo?||Small Animal Building|