There was a time when some spider web trees (in the image below) were seen in Pakistan. In fact, in 2010, several regions of Pakistan were flooded, resulting from heavy rains which caused many cities to be submerged in water. But once the rain stopped, people began noticing trees were covered by sticky webs. Since it took longer than usual for the water in the flooded area to recede, large quantities of insects, spiders, and other creatures were forced to seek shelter above ground. As a result, the millions of spiders living on the ground made their nests on the trees to escape the rising flood waters.
Due to staying in the same place for many days, the spiders made a web coating on the trees with their webs, and the trees started appearing like this. The result was a number of cocooned trees wrapped in spider webs so thick that they were visible from yards away. But along with this it also had one of its biggest advantages. Due to the accumulation of water in the flood-affected areas for several days, the possibility of spreading malaria through mosquitoes increased. But thanks to these spiders, all the mosquitoes got trapped in spider webs on the trees and died and the risk of malaria was averted.
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Apart from Pakistan, such Cocooned Trees were also seen in Australia after the 2012 floods. Here the spiders covered fields and trees and a thick blanket of webs appeared. But this web coating on the trees was much thicker than in Pakistan, the reason for which was the powerful and large size spiders there. Even, a small town in Greece, Aitoloko was also occupied by spiders, called by the name "Tetragnatha". These spiders do not harm humans, and their specialty is that they can lengthen their bodies by stretching it, hence they are also called "stretch spiders".
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