New World Tarantula vs. Old World Tarantula

Attribute	New World Tarantula	Old World Tarantula
Origin	Americas	Africa, Asia, Australia
Defensive Behavior	Urtsicating hairs	Bite
Abdomen Shape	Round	Oval
Leg Span	Varies	Varies
Coloration	Varied	Varied

Physical Attributes

New World tarantulas, which are native to the Americas, tend to have urticating hairs on their abdomens that they can flick at predators as a defense mechanism. These hairs can cause irritation and even allergic reactions in humans. In contrast, Old World tarantulas, found in Asia, Africa, and Australia, lack these urticating hairs but are known for their potent venom. Old World tarantulas have larger fangs compared to their New World counterparts, allowing them to deliver a more powerful bite.

Behavior

New World tarantulas are generally more docile and less likely to bite when threatened. They are known to flick their urticating hairs as a first line of defense before resorting to biting. On the other hand, Old World tarantulas are often more aggressive and quick to bite when provoked. Their venom can be more potent and cause more severe reactions in humans, making them less desirable as pets for beginners.

Habitat

New World tarantulas are typically found in the Americas, where they inhabit a variety of environments ranging from deserts to rainforests. They are often burrowers, creating silk-lined burrows in which they hide and ambush prey. Old World tarantulas, on the other hand, are commonly found in tropical regions of Asia, Africa, and Australia. They are more likely to be arboreal, meaning they live in trees or other elevated structures.

Size

New World tarantulas tend to be larger in size compared to Old World tarantulas. Some species of New World tarantulas, such as the Goliath birdeater (Theraphosa blondi), can have a leg span of up to 11 inches, making them one of the largest tarantula species in the world. In contrast, Old World tarantulas are generally smaller in size, with leg spans ranging from a few inches to around 8 inches.

Coloration

New World tarantulas often exhibit vibrant colors and patterns, making them popular among tarantula enthusiasts. Some species, like the Mexican redknee tarantula (Brachypelma smithi), have striking red and black coloration. Old World tarantulas, on the other hand, tend to have more subdued colors, such as browns and blacks. This difference in coloration is thought to be a result of the different environments in which these tarantulas evolved.

Reproduction

Both New World and Old World tarantulas undergo a similar reproductive process, with the male performing a courtship ritual to attract the female. However, there are some differences in behavior during mating. New World tarantulas are known for their elaborate courtship dances, which can involve drumming on the ground or vibrating their bodies. Old World tarantulas, on the other hand, are often more aggressive during mating, with the male risking being eaten by the female if he is not careful.

Conclusion

In conclusion, New World and Old World tarantulas have distinct differences in their physical attributes, behavior, habitat, size, coloration, and reproduction. While New World tarantulas are known for their urticating hairs and docile nature, Old World tarantulas are recognized for their potent venom and aggressive behavior. Both types of tarantulas have their own unique characteristics that make them fascinating creatures to study and observe in the wild or as pets.