Migidae

Migidae is a family of spiders belonging to the order Araneae. They are commonly known as tarantulas, although this term is often used more broadly to refer to large, hairy spiders. Migidae are found in the Americas, with the majority of species occurring in South America. They are characterized by their long, slender legs and the presence of a spinneret with a single, large, and often brightly colored spinneret. The family includes about 100 species, with the most well-known being the Brazilian tarantula (Brachypelma smithi) and the Mexican red-knee tarantula (Brachypelma boehmei).

Migidae are known for their venom, which is generally considered less toxic than that of other tarantula species. However, their bites can still cause pain and swelling. They are also known for their unique mating behavior, where the male transfers sperm to the female using a pedipalp organ called the embolus. This behavior is often referred to as "embolization."

The family Migidae is further divided into several genera, including Brachypelma, Avicularia, and Cyriopagopus. Each genus has its own unique characteristics and distribution. For example, Brachypelma species are known for their large size and vibrant colors, while Avicularia species are often found in the rainforests of Central and South America.

Despite their reputation as dangerous creatures, Migidae are generally not aggressive towards humans and will only bite if provoked. They are also important in their ecosystems, serving as both predators and prey for other animals.