A whole colony of the Rosser's sac spider, feared extinct 10 years ago, is found crawling in the Cambridgeshire neighborhood in UK.

Ian Dawson, who spotted the first Rosser's sac spider after a gap of 10 years, said, "I was extremely surprised to find the first one and then when we went back a month later it was great to find more of them. If we've managed to find 10 of them, I think there must be quite a sizeable population of Rosser's at that particular site."

These light brown colored spiders seen only once before, are spotted at the Chippenham Fen. They were believed to be extinct as their habitat comprising mainly of bogs and swamps was destroyed due to human interference. After spotting it for the first time in the 1950s, the spider was under threat due to the flushing out of the wetlands and changing farm practices after WW II. Feared extinct ten years ago, the spider resurfaced in September at Cambridgeshire.

Researchers combed the whole area in October found a colony of 10 Rosser's sac spiders. Matt Shardlow, chief executive of insect conservation charity Buglife said, “It’s fantastic that it's still creeping around in the British countryside and we're ecstatic that people can now see what it looks like for the first time in history. This spider is globally endangered. ”

The Rosser's sac spider belongs to Clubionid family of spiders. Unlike other spider species, it never builds a web to catch its prey, but hunts it down. Mike Taylor from Natural England who manages the Chippenham Fen reserve believes, "Rosser's sac spiders spend their days hidden in tubular silken retreats, often in a folded leaf, a bit like a sleeping bag.”

Researchers have also captured Rosser's sac spider pictures for the future generation. But, Matt Shardlow stresses on the conservation of these rare spider species for the generations to come. He said, "If we want future generations to be able to see the live animal, we will need to take great care of the tiny remaining fragments of wild wetlands in this country and reinstate large areas of lost fen."