The UK has seen a remarkable increase in the population of giant fen raft spiders, thanks to conservation efforts led by Chester Zoo. A decade ago, the zoo released thousands of these spiders into the wild after the species faced a sharp decline. Now, there are over 10,000 breeding females across the country, marking a record high for these arachnids in the UK.
The fen raft spider, about the size of a human hand, is harmless and plays a crucial role in maintaining healthy aquatic ecosystems. These semi-aquatic spiders are skilled hunters, using their legs covered in tiny hairs to detect vibrations on the water’s surface and capture prey such as other spiders, damselflies, dragonfly larvae, pond skaters, and even fish and tadpoles.
Sadly, 15 years ago, the fen raft spider was on the brink of extinction due to the destruction of its wetland habitat. To save the species, Chester Zoo embarked on a conservation breeding rescue program in partnership with the RSPB, rearing hundreds of baby spiders in test tubes before releasing them back into their natural habitat.
The RSPB estimates that there are now 10,000 breeding females in the UK, marking the most successful year on record for the fen raft spider. Tim Strudwick, site manager at RSPB Mid Yare nature reserve, expressed pride in the role their reserves played in the spider’s recovery, highlighting the importance of these spiders in maintaining aquatic diversity in grazing ditches.
The collaborative efforts of conservation organizations and zoos have proven instrumental in saving the fen raft spider from extinction and restoring their population to healthy levels in the UK. These efforts serve as a reminder of the importance of conservation in preserving wildlife and biodiversity for future generations.
