An Orb-weaver spider (Araneus diadematus) in Rennes, western France (Photo: Damien Meyer/ AFP/Getty Images)
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City living is making spiders bigger, study finds

According to new research, city-dwelling spiders are larger and more fertile than their rural-dwelling relatives.

The growth of cities destroys the homes of many animals. With habitats drenched in cement, their only option is to relocate - and in the worst cases, urban expansion can cause species extinction. However, it’s not all doom and gloom for some species, as city living appears to bring out the best in them. Have you noticed that spiders are looking meatier nowadays?

According to new research, city-dwelling spiders are flourishing. Similar to rats and pigeons, spiders are “urban exploiters”. This means that they thrive in urban surroundings. Despite our squeamish attitudes towards them, spiders are important creatures: they greatly impact food webs, plant colonies and herbivore abundance, and they help to control the insect populace.

Most research on the expansion of cities focuses on birds. For instance, noise pollution has forced birds to change their calls, while other studies show that some birds have even stopped migrating. Researchers from the University of Sydney, however, were interested in the changes in spider anatomy that might have come from living in cities, and specifically Golden Orb-Weaving (Nephilla Plumipes) spiders, which are common in both urbanised and rural Australian landscapes. They build strong semi-permanent webs with golden-looking silk, and, once matured, they reside in this web their entire life. Thus, their “coach potato” lifestyle makes them ideal research subjects.

The researchers collected 222 spiders from rural and urbanised areas. All spiders were female and had reached maturity, and their body size, fat reserves, and ovary weight were recorded. The findings showed that rural-dwelling spiders had smaller bodies, but that city-dwelling spiders were larger, and more fertile. Places with roads, buildings and a lack of greenery typically denoted larger spiders. The researchers proposed that temperature differences could explain these results, as cities are much warmer than rural areas thanks to the urban heat island effect.

Their results could also reflect differences in prey availability. The study's lead author, ecologist Elizabeth Lowe, explained in more detail:

There were strong associations in particular between spider size and the presence of hard surfaces (such as roads and buildings) and lack of vegetation. These hard surfaces contribute to the urban “heat island” effect, which makes it warmer in cities than surrounding areas. It is also likely that there is more food for the spiders in the city as a result of night lighting and increased resources. This combination of warm temperatures and more food would allow spiders to put more energy towards growth and reproduction. Fewer predators and parasites in urban areas could also allow urban spiders to grow larger.”

This study is only applicable to one species of spider in one Australian city, so it's not fair yet to say that all urban spiders are getting bigger - so don't panic about huge spiders with larger ovaries just yet. However, the researchers pledge that this is promising news:

The fact that some spiders benefit from urbanisation is a good thing. In order to maintain biodiversity in cities, we need to be able to support diverse populations of spiders and other invertebrates” Lowe said. “By gaining a better understanding of the impacts of urbanisation on wildlife in cities, we can work towards creating healthy, functioning ecosystems in urban areas." 

All photos: BBC
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“You’re a big corporate man” The Apprentice 2015 blog: series 11, episode 8

The candidates upset some children.

WARNING: This blog is for people watching The Apprentice. Contains spoilers!

Read up on episode 7 here.

“I don’t have children and I don’t like them,” warns Selina.

An apt starting pistol for the candidates – usually so shielded from the spontaneity, joy and hope of youth by their childproof polyester uniforms – to organise children’s parties. Apparently that’s a thing now. Getting strangers in suits to organise your child’s birthday party. Outsourcing love. G4S Laser Quest. Abellio go-carting. Serco wendy houses.

Gary the supermarket stooge is project manager of team Versatile again, and Selina the child hater takes charge of team Connexus. They are each made to speak to an unhappy-looking child about the compromised fun they will be able to supply for an extortionate fee on their special days.

“So are you into like hair products and make-up?” Selina spouts at her client, who isn’t.

“Yeah, fantastic,” is Gary’s rather enthusiastic response to the mother of his client’s warning that she has a severe nut allergy.

Little Jamal is taken with his friends on an outdoor activity day by Gary’s team. This consists of wearing harnesses, standing in a line, and listening to a perpetual health and safety drill from fun young David. “Slow down, please, don’t move anywhere,” he cries, like a sad elf attempting to direct a fire drill. “Some people do call me Gary the Giraffe,” adds Gary, in a gloomy tone of voice that suggests the next half of his sentence will be, “because my tongue is black with decay”.

Selina’s team has more trouble organising Nicole’s party because they forgot to ask for her contact details. “Were we supposed to get her number or something?” asks Selina.

“Do you have the Yellow Pages?” replies Vana. Which is The Apprentice answer for everything. Smartphones are only to be used to put on loudspeaker and shout down in a frenzy.

Eventually, they get in touch, and take Nicole and pals to a sports centre in east London. I know! Sporty! And female! Bloody hell, someone organise a quaint afternoon tea for her and shower her with glitter to make her normal. Quick! Selina actually does this, cutting to a clip of Vana and Richard resentfully erecting macaroons. Selina also insists on glitter to decorate party bags full of the most gendered, pointless tat seed capital can buy.

“You’re breaking my heart,” whines Richard the Austerity Chancellor when he’s told each party bag will cost £10. “What are we putting in there – diamond rings?” Just a warning to all you ladies out there – if Richard proposes, don’t say yes.

They bundle Nicole and friends into a pink bus, for the section of her party themed around the Labour party’s failed general election campaign, and Brett valiantly screeches Hit Me Baby One More Time down the microphone to keep them entertained.

Meanwhile on the other team, Gary is quietly demonstrating glowsticks to some bored 11-year-old boys. “David, we need to get the atmosphere going,” he warns. “Ermmmmm,” says David, before misquoting the Hokey Cokey out of sheer stress.

Charleine is organising a birthday cake for Jamal. “May contain nuts,” she smiles, proudly. “Well done, Charleine, good job,” says Joseph. Not even sarcastically.

Jamal’s mother is isolated from the party and sits on a faraway bench, observing her beloved son’s birthday celebrations from a safe distance, while the team attempts to work out if there are nuts in the birthday cake.

Richard has his own culinary woes at Nicole’s party, managing both to burn and undercook burgers for the stingy barbecue he’s insisted on overriding the afternoon tea. Vana runs around helping him and picking up the pieces like a junior chef with an incompetent Gordon Ramsay. “Vana is his slave,” comments Claude, who clearly remains unsure of how to insult the candidates and must draw on his dangerously rose-tinted view of the history of oppression.

Versatile – the team that laid on some glowstick banter and a melted inky mess of iron-on photo transfers on t-shirts for Jamal and his bored friends – unsurprisingly loses. This leads to some vintage Apprentice-isms in The Bridge café, His Lordship's official caterer to losing candidates. “I don’t want to dance around a bush,” says one. “A lot of people are going to point the finger at myself,” says another’s self.

In an UNPRECEDENTED move, Lord Sugar decides to keep all four losing team members in the boardroom. He runs through how rubbish they all are. “Joseph, I do believe there has been some responsibility for you on this task.” And “David, I do believe that today you’ve got a lot to answer to.”

Lord Sugar, I do believe you’re dancing around a bush here. Who’s for the chop? It’s wee David, of course, the only nice one left.

But this doesn’t stop Sugar voicing his concern about the project manager. “I’m worried about you, Gary,” he says. “You’re a big corporate man.” Because if there’s any demographic in society for whom we should be worried, it’s them.

Candidates to watch:


Hanging on in there by his whiskers.


Far less verbose when he’s doing enforced karaoke.


She’ll ruin your party.

I'll be blogging The Apprentice each week. Click here for the previous episode blog. The Apprentice airs weekly at 9pm, Wednesday night on BBC One.

Anoosh Chakelian is deputy web editor at the New Statesman.