Conservation Success Story as Fen Raft Spiders Thrive in the UK

Large spiders, some reaching the size of a human hand, are becoming increasingly visible across the UK. The fen raft spider, in particular, has been sighted, sparking a range of reactions among the public.

Chester Zoo played a significant role in the resurgence of this species. A decade ago, the zoo released thousands of these giant spiders into the UK. The breeding program has been successful, with over 10,000 breeding females now present, and a record-breaking mating season recently concluded.

The public's response to the spiders is mixed. Some are pleased to see the species thriving, while others express apprehension about encountering one. The fen raft spider was nearly extinct in 2010, but thanks to conservation efforts, it has made a comeback.

These spiders are typically found in marshes, particularly from June to September. They are known for their ability to run across the surface of water. Despite their size, they are not venomous and pose no threat to humans. The best time to spot them is during the hatching of young spiders, when they can be seen near the water's edge on sunny days.