Sac or tube spiders, Family Clubionidae
The spiders are not large and mostly brownish without any clear markings. They are nocturnal hunters and they spent their daytime in a densely woven silk cell that often had two openings. The spiders make their living tubes under stones, loose bark, between moss but also between leaves.
Mating takes place in this living tube. There is almost no foreplay when the male approaches the female. The mother guards here eggs and after hatching the young remain in the living tube for some time.
The do not make a web to catch but actively hunt for their prey. They use two tactics for prey capture. The easy way, just wait or like a cat crawling to the prey and jump on it. They can walk on rough or flat surfaces like glass.
The fourth leg pair are often the longest pair. Their spinners are large.
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