Bird-catching spiders belong to primitive spiders and are covered with fine hairs. Some bird-catching spiders in South America and North America have an irritating bristle in some places. When you meet natural enemies such as mice, you can sweep away this natural antipruritic powder with your hind feet. The reaction of enemy objects, such as workers laying woven glass mats, will itch all over. Because this kind of protection can be used, it may not bite people like bird spiders in Asia and other places. American bird spider, so its toxicity is often lower than that in Asia and other places. Only one species of Asian-American spider (Yamiwataseikishida1928) was found in Lan Yu, Taiwan Province Province.

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Bird spider

Another name

Bird spider

boundary

animal kingdom

door

arthropoda

subdivide

Clam subfamily

morphological character

Due to different species, the spider's body length varies from 2.5 to 10 cm, and its foot spread is 8 to 30 cm (the measurement standard of foot spread is the length from the end of the hind leg to the end of the opposite leg, that is, the diagonal length).

The largest spider: Amazon giant bird-eating spider (from Venezuela and Brazil), with a foot span of more than 30 cm.

Venezuela's giant pink bird spider was discovered 187 years later than Amazon's giant bird spider, so some features have not been fully confirmed. It is generally believed that Amazon Giant Bird Spider is the heaviest bird spider in the world, while Venezuela Giant Bird Spider is the largest in the world.

Living habits

The bird spider was first discovered by German naturalist maria sibylla merian in Surinam, South America, and was named the bird spider (when it was discovered, it was hunting birds, so it was named the bird spider. The venom of bird spider has the efficacy of treating Alzheimer's disease, epilepsy and other diseases. So there is a great demand. Over the years, people began to cultivate bird spiders artificially.

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Bird spider

Amazon Giant Bird Spider is the largest spider, with the largest foot span of 30 cm. Originated in the Amazon rainforest, living in a tree hole, you can eat the sparrows' cubs and eat the whole squab at a time. They have long fangs, usually 5 mm long, which are convenient for injecting venom into their prey. Bird-catching spiders are the "giants" among spiders. It is about the size of a fist (5- 15cm), and the body width can reach more than 20cm when the four legs are spread out.

Some bird spiders are one of the smartest hunters in nature. Some bird-catching spiders have unique web-building ability, and rely on the vibration of the web and the ground to perceive the prey within their attack range, so as to attack. Once birds, frogs, scorpions and other insects that bird-eating spiders like to eat fall into the net, they will definitely become food for bird-eating spiders. Bird-eating spiders usually move at night and hide in nests or roots near the net during the day. As soon as the prey touches the net, it quickly crawls over, catches the prey and secretes venom to poison it as food. Because it is very fierce, human beings have to be vigilant. A spider web can bear the weight of 300 grams. 1975 several branches of a big tree were found in Mexico, covered by a huge multi-layer spider web. The largest net can cover the top three quarters of the branches of a tree 18.3 meters high.

Bird-catching spiders in the New World can wipe the hair off their bellies with their feet when they are besieged. Once their opponents persist, they will be itchy and painful, and they will not dare to chase again. Bird-catching spider's eyes are located in the depression at the top of the head breastplate, which is very small, with four * * *, arranged in two rows. Most of them are only used to sense the brightness of light and the motion of objects. Arboreal bird-catching spiders usually have better eyesight than terrestrial spiders. The bird-catching spider also has a pair of powerful claws on its head and mouth, like a pair of pliers, which can rotate freely. Poisonous glands are attached under the teeth, and venom can be secreted from the tips of teeth. Bird spiders like to be alone. Laying eggs can generally live for more than ten years, or even 30 years.