Recently, a traveler found some strange holes near the Queensland coast of Australia, each with a lid, like a plug in a bathtub. At the entrance of each cave there will be a very fitting lid, like a cave door. And one end of each door lid is linked to the main body of the cave, as if each lid were fitted with hinges. When the lid is lifted, it looks like a small turret.
After looking nearby, another similar cave was found, with rounded and regular entrances, but the shape of the lid was not the same. The edges of this lid are evenly distributed with some serrations that look like the small flywheels of a bicycle.
After asking the locals, I learned that this is actually the nest of some kind of spider. This spider is collectively known as the trapdoor spider and is distributed in Argentina, Africa and Australia, the United States and other places. Trap-gate spiders are also called trap spiders, and they get this name because they use soil, vegetation, and silk to build cave doors, and silk acts as a trap for the leaf. Sensing the vibrations of passing prey, this spider animal burrows out of the hole and enjoys a delicious meal.
They can nest in the ground up to 1 meter deep, and at the mouth of the cave with soil and silk thread to build a movable door cover, the cave near the arrangement of several spider silk as sensors, trapdoor spiders in the cave entrance door cover under the plant waiting for rabbits, as long as there is prey passing by and touch the induction silk thread, will rush out of the hole to drag the prey into the nest, with great precision, and after eating will throw the wreck around the nest
surround. This spider is very fierce, and will pose as soon as the wind blows, and will not hesitate to attack if it encounters a threat.
The Money Trapdoor Spider is one of the most famous, this spider has a regular pattern on its butt, like some kind of totem, and is also similar to ancient coins. Money trapdoor spiders mainly come from foreign Southeast Asian rainforests (China's Yunnan, Guangxi also have distribution), because they are beautiful, docile, good breeding, valuable, rare, has been a foreign pet market sought-after goods, the number is rare, the supply is scarce, the price is expensive.