Tarantulas can walk on walls.
Did you know that?
I didn't,
until I woke up about a week ago and saw one on the wall above my bed watching me sleep.
I could not see its eyes but I'm sure it was watching me sleep.
A nice wake-up surprise, it was.
Kingdom Animalia
Phylum Anthropoda
Sub Phylum Chelicerata
Class Arachnida
Order Arenae
Sub Order Mygalomorphae
Family Theraphosidae
Etymology
The name "tarantula" originates from a spider that resides in the area around the Southern Italian town of Taranto. Interestingly, this "original" tarantula — the European wolf spider — is only distantly related to the spiders popularly associated with the term.
According to local myth, a bite from one of these creatures is deadly and can only be countered by a furious dance called the Tarantella, consisting of spins and jumps performed until the dancer collapses from exhaustion.
Tarantula
Tarantulas are the largest spiders in the world.
Now, tarantulas as we know them — any of the 800-plus species making up the large and hairy family of Theraphosidae — are found worldwide. They prefer dry soil that drains well. Most live in burrows lined with silk to keep out trickling debris; some hide under shaded logs; some build silk nests on cliff faces and in trees.
Tarantulas vary a bit in size: counting legspan, an inch to twelve inches across.
Most dinner plates are roughly ten inches.
Most of these spiders are a rather plain black, brown, or tan. The pink zebra beauty is black with white stripes; the greenbottle blue has metallic blue legs and a bright orange abdomen.
Tarantulas are hairy. New world species have a thick coat of urticating hairs on the abdomen and back legs that detach and cause irritation when the spider is threatened or mishandled. The hairs also make handy territory markers and egg-sac protectors. In people, urticating hairs usually cause a mild rash; but some entusiasts are forced to resign their pet spiders because allergic reactions are severe enough to constrict breathing. Once detached, urticating hairs leave behind a noticeable bald spot that remains until the next molt.
Tarantulas breathe through book lungs located on the underside of the abdomen, so-called because they consist of many layers of skin — like pages in a book — that take oxygen from the outside air with passing blood. Like gills for dry land.
Tarantulas hiss by rubbing their jaws, legs, or palps together. Hissing spiders.
Sexual maturity occurs several years after hatching, preceded by a series of molts. These are long-lived critters: captive specimens have lived 40 years. In late summer sexually mature males leave their hiding places and walk about, searching for females. Upon finding a prospective mate, the fellow vibrates his abdomen and taps his legs; if the gesture is returned coupling begins.
Males are wise to leave soon afterward to avoid being eaten.
The mechanics of tarantulan intercourse are different from yours and mine. The male pastes a web to a flat surface and rubs his abdomen against it, depositing a quantity of semen. He then retrieves the semen with his pedipalps — leg-like appendages between the chelicerae and front legs — and deposits them in the corresponding genital opening in the underside of the female's abdomen during the mating ritual.
After mating, the female fills a sac with a mixture of semen and some 500 to 1,000 eggs and stands guard for several weeks while the spiderlings incubate. The young tarantulas remain in the burrow for some time after hatching, then scatter in all directions.
Tarantulas are nocturnal hunters, and are deviously well-equipped. While their eyesight shows them little more than movement and shades of light and dark, their hairs are sensitive enough to detect the size and location of approaching prey from vibrations in the ground. Tarantulas are ambush artists, typically waiting just out of sight or half inside their lair. They will attack anything reasonably sized, including small lizards; some of the largest tarantulas eat birds. Captured prey is held in place with the palps and ground into a ball which is dissolved from the outside with digestive fluids.
Tarantula as delicacy
In the South American Amazon, tarantulas are considered a delicacy. They are a cousin to shellfish and are said to taste like shrimp.
To eat a tarantula:
- Hold it down with a stick.
- Bend its legs up and tie them together.
- Roast it alive in a folded leaf.
- Enjoy.
Tarantula as pet
Although tarantulas are frightening to look at, they are harmless to people. It did not take long for folks to figure out that they would make cool pets.
Keep your tarantula in a well-ventilated container, be it a plastic box or terrarium. Potting soil makes a good substrate because it's easy to dig. Don't use cedar chips — they're toxic to most spiders. While sand works well for small reptiles, it's bad for tarantulas because it can't be burrowed. Of course, burrowing tarantulas require a much deeper layer of substrate.
Feed your tarantula crickets, moths, mealworms, flies, and cockroaches. If your tarantula is large it may accept live baby rodents. As a rule of thumb, limit prey to half your tarantula's size. Buy from clean sources to ensure that food is not contaminated with pesticides. Remove uneaten dead prey within 24 hours to keep conditions healthy. Provide drinking water in shallow containers or misted on the walls of the enclosure.
Most tarantulas are safe in 70-85 degrees Farenheit. Monitor temperature assiduously. Higher temperatures result in faster metabolism and dehydration. Provide humidity according to species by moisturizing the substrate. Provide heat with an incandescent black light that won't disturb the spider. If you own a desert species, let the temperature drop 10 degrees at night.
All tarantulas are cannibalistic, so don't enclose them communally unless you're an experienced owner.
Tarantulas may not eat for a week before molting. Uneaten prey will stress your spider during molting, and formidable meals can injure or kill. White molting your spider will be on its back; it is not dead. Wait three days after completion to resume feeding.
Handling your tarantula is not advisable, primarily for the sake of the tarantula. These animals are easily injured. For your sake, don't make sudden movements or be rough. When threatened, the tarantula will rear up and hiss; next, it will slap downward with its forelimbs; failing that, it will flick urticating hairs toward the perceived threat; with all other options exhausted, it will either bite or turn tail and run.
If bitten, let the bleeding wash the puncture out from within. Wash externally with soap and water. Remove urticating hairs with tape. Never surprise a tarantula.
Sources
Overton, Martin. "Tarantula Facts."
http://www2.tltc.ttu.edu/thomas/classpet/1999/Tarantula-Facts.htm
Wikipedia.
http://en.wikipedia.org/wiki/Tarantula
Desert USA.
http://www.desertusa.com/july96/du_taran.htm
Tarantulas dot com.
www.tarantulas.com/care.asp