Jan 27

#LoveSpecies nominee: horrid ground-weaver

Nominated by: BugLife

Horrid ground-weaver spider

Why do you love it?

The horrid ground-weaver (Nothophantes horridus) is an extremely rare endemic money spider so called because of a corruption of its Latin name horridus which means hairy. A look at the spider under magnification indeed shows that it has a series of hairs or bristles sticking out from all its legs. It is just 2.5mm across, hence the need to observe under magnification. Until last year the only images available of this enigmatic little spider were a line drawing and a photo of a specimen in formaldehyde.

The spider lives in limestone cracks and crevices and is a nocturnal hunter across scree slopes most likely feasting on springtails and other small invertebrates. The IUCN added the Horrid ground-weaver to its list of endangered species in 2016 and it is probably the UK’s most rare spiders listed under Section 41 of the 2006 Natural Environment and Rural Communities Act.

What are the threats to the horrid ground-weaver?

The spider only lives on three recorded sites in Plymouth one of which has been developed into an industrial estate and another of which in 2015 was subject to a planning appeal for development. Buglife mounted a campaign to save the site, Radford Quarry, and were delighted when the planning inspector agreed to prevent development.

Many people who supported the campaign to save the Horrid ground-weaver were not spider fans indeed some were arachnophobes but they saw the importance of saving it – one supporter Helen stated on the petition “Not a panda, but just as important.”

What are you doing to save it?

After saving the site Buglife raised funds to study the spider which has now been found on a further site and we have also managed to obtain the fist ever photos and video of the Horrid ground-weaver in situ. All this was possible because over 10,000 individuals signed the petition and donated by a crowd funder. 2017 sees another obscure endemic under threat Fonseca’s seed-fly found on the north east dune scape of Scotland its habitat threatened by a golf course. Currently the only specimens of Fonseca’s seed-fly are in formaldehyde there are no photos.

Check out the Buglife website to see how you can help.

VOTE NOW!

Jul 6
Photo of captive female Rameshwaram parachute spider, camouflaged among dead leaves

Rameshwaram parachute spider (Poecilotheria hanumavilasumica)

Species: Rameshwaram parachute spider (Poecilotheria hanumavilasumica)

Status: Critically Endangered (CR)

Interesting Fact: Instead of using a web to catch prey, the Rameshwaram parachute spider actively catches its victims by ambushing them and injecting paralysing venom.

The Rameshwaram parachute spider is a colourful, tree-dwelling tarantula with an attractive pattern of light and dark markings. As its name suggests, this species is found on Rameshwaram Island, off the coast of Tamil Nadu, India, although it also occurs on adjacent parts of the mainland. It can be distinguished from other spiders in its genus by the distinctive yellow colour on the underside of its front legs. Although relatively little is currently known about the Rameshwaram parachute spider, it is likely to live in dark, well-protected cavities such as tree holes or inside house walls. This species feeds mainly on insects. Females can live for several breeding seasons, and may produce up to 52 young at a time. The Rameshwaram parachute spider typically lives in tree palm, coconut or tamarind plantations, but also occurs in human habitations.

The main threat to the Rameshwaram parachute spider is habitat loss, as the plantations it inhabits are being destroyed to make way for houses and other developments, as well as rice fields. This rare spider occurs in only a few highly fragmented locations, and its remaining patches of habitat are very small. Although not common in the pet trade, this attractive tarantula has also been known to be exported. Unfortunately, the Rameshwaram parachute spider is not protected by law. Proposals to create a spider sanctuary at the Hanumavilasum temple, which is home to the largest colony of this species, were sadly never put into practice.

 

Find out more about conservation in India at Conservation India and Wildlife Conservation Society – India.

See images of the Rameshwaram parachute spider on ARKive.

Liz Shaw, ARKive Text Author

Sep 20

A warm spring followed by a wet summer has created a bumper year for spiders in the UK, according to scientists.

House spider image

House spider (Tegenaria domestica)

The abundance of spiders is believed to be down to a plentiful supply of pollen earlier in the year, which has produced an influx of insects on which spiders prey.

As cooler temperatures set in, spiders such as the house spider (Tegenaria domestica) move into homes in search of warmth and a mate. With arachnophobia being one of the most common phobias in the UK, this invasion is not welcomed by everyone and has led to an increase in calls to zoos to report strange spiders.

Spider expert Angela Hale says, “People suddenly start seeing big spiders everywhere and think they have some exotic breed on their hands. But the reality is that at this time of year they are mating and are pregnant. So you are seeing the males scuttling around looking for the females and then you have the females with great bulbous bodies full of eggs.

Fen raft spider image

Fen raft spider (Dolomedes plantarius)

Britain’s largest spider to be reintroduced

This year is also looking good for one of the UK’s most endangered species of spider, the fen raft spider (Dolomedes plantarius). With a leg span of around 10 centimetres, this is the largest species of spider in the UK. The numbers of this species have fallen in recent years due to the degradation of its wetland habitat, but keepers at Chessington Zoo are now hand raising 200 baby fen raft spiders in order to release them back into the wild.

Occurring in just three places in the UK, the fen raft spider does not build a web but hunts on the water’s surface, capturing prey as large as sticklebacks. The captive-reared spiderlings are currently being hand-fed on a diet of fruit flies until they are large enough for release in October.

Their keeper, Bob Ward, said, “Having to feed 200 spiders one at a time is certainly a challenge, but it’s vital to help see them through the most vulnerable period of their lives before they are released back into the wild, as they will then have a much better chance of surviving.

Ladybird spider image

Ladybird spider (Eresus sandaliatus)

Ladybird spiders released in Dorset

Arguably one of the UK’s most beautiful spiders, the ladybird spider is another species that has benefitted from conservation action. Once feared extinct in the UK, this elusive species spends most of its time underground and get its name from the bright red and black markings of the mature males.

Reduced to just 56 individuals by habitat loss, the ladybird spider population has soared to over 1,000 since 1994, thanks to conservation efforts. However, it still only occurs at a few sites in Dorset, so 30 individuals have recently been released at the RSPB’s Arne reserve to boost its populations.

A warden at the reserve, Toby Branston, said, “To be introducing such a rare new species here is very exciting, and I hope we can help spread it further.

Ladybird spider image

Female (left) and male (right) ladybird spiders with egg sac

Read the Guardian article – Good year for spiders sparks a surge of arachnophobia.

Read the Telegraph article – Britain’s largest spider to be reintroduced.

Find out more about ladybird spider conservation on the BBC news website

View images and footage of spiders on ARKive.

Becky Moran, ARKive Species Text Author

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