When threatened, the fly flashes its wings to give the appearance of ants walking back and forth.
When threatened, the fly flashes its wings to give the appearance of ants walking back and forth.

Fruit fly with the wings of beauty



AL AIN // Of all the resplendent beauties in the insect kingdom, few might look to the humble fruit fly for its delicacy or charm.
But a closer examination of the transparent wings of Goniurellia tridens reveals a piece of evolutionary art. Each wing carries a precisely detailed image of an ant-like insect, complete with six legs, two antennae, a head, thorax and tapered abdomen.
"The image on the wing is absolutely perfect," says Dr Brigitte Howarth, the fly specialist at Zayed University who first discovered G tridens in the UAE.
It is a member of tephritidae, a family - there are two - of 5,000 species of fruit flies whose colourful markings have earned them the name "peacock flies".
In the UAE alone, 27 picture wing species are known. Some have wings bearing simple shapes but others, like G tridens, are far more complex.
Dr Howarth first saw G tridens on an oleander shrub in northern Oman. "I was looking at the stem of the leaves and I noticed that there were some insects crawling around. When I sort of honed in I started to notice what I thought was a couple of ants moving around."
At first she suspected an infestation on the fly's wings. "But it was so symmetrical that I thought, 'oh this is not possible'. When I got it under the microscope I realised that these were insects painted onto the wings."
In contrast to its wings and brilliant green eyes, the fly's body is a dull greenish grey - "almost cryptically coloured," says Dr Howarth - that blends into the leaves where it is found.
When threatened, the fly flashes its wings to give the appearance of ants walking back and forth. The predator gets confused and the fly zips off.
This defence mechanism may also make the fly attractive to potential mates - something that is less of a concern for the average housefly.
"A lot of flies, if a male sees a female that is suitable it just flies up and tries to latch on," said Dr Howarth. But G tridens has an altogether more amorous courtship, showing off its wings in a colourful dance. And Dr Howarth believes it is no exception.
"If you look at the behaviour, it tells you a lot about the functionality," said Dr Howarth. "Not everybody gets to mate. The ones that do have something about them that make them more attractive.
"Is it the same in other invertebrates, who knows? It's very possible that those are in fact for courtship behaviour."
This elaborate behaviour may be a response to the fly's restrictive environment. "Something that can survive anywhere doesn't need to have as many protection factors," said Dr Howarth.
The more realistic the picture on the wing, the better its chance of survival and reproduction.
"It's all about optimising your possibilities of survival. There's always variety and some individuals, for whatever reason, have more of a success because of that variation."
G tridens's looks have served it well. Since it was identified in 1910, it has been found in the Near and Middle East, India, and central Asia.
Females lay eggs in plant tissue, like fruits and flowers, where the larvae feed. This does not usually harm the plant but many fruit flies are still considered pests.
Whether a pest or a flying piece of art, it is around us every day.
"I would say most people that have sat in their gardens with a cool orange juice or water in their hand in the early morning sun and looked down at the ground would have seen a picture-wing fly."
 
azacharias@thenational.ae

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Surianah's top five jazz artists

Billie Holliday: for the burn and also the way she told stories.  

Thelonius Monk: for his earnestness.

Duke Ellington: for his edge and spirituality.

Louis Armstrong: his legacy is undeniable. He is considered as one of the most revolutionary and influential musicians.

Terence Blanchard: very political - a lot of jazz musicians are making protest music right now.

The Penguin

Starring: Colin Farrell, Cristin Milioti, Rhenzy Feliz

Creator: Lauren LeFranc

Rating: 4/5

The specs

Engine: 2.0-litre 4-cylinder turbo hybrid

Transmission: eight-speed automatic

Power: 390bhp

Torque: 400Nm

Price: Dh340,000 ($92,579

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DRIVERS' CHAMPIONSHIP STANDINGS

1. Sebastian Vettel (Ferrari) 171 points
2. Lewis Hamilton (Mercedes-GP) 151
3. Valtteri Bottas (Mercedes-GP) 136
4. Daniel Ricciardo (Red Bull Racing) 107
5. Kimi Raikkonen (Ferrari) 83
6. Sergio Perez (Force India) 50
7. Max Verstappen (Red Bull Racing) 45
8. Esteban Ocon (Force India) 39
9. Carlos Sainz (Torro Rosso) 29
10. Felipe Massa (Williams) 22

SPECS
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Tributes from the UAE's personal finance community

• Sebastien Aguilar, who heads SimplyFI.org, a non-profit community where people learn to invest Bogleheads’ style

“It is thanks to Jack Bogle’s work that this community exists and thanks to his work that many investors now get the full benefits of long term, buy and hold stock market investing.

Compared to the industry, investing using the common sense approach of a Boglehead saves a lot in costs and guarantees higher returns than the average actively managed fund over the long term. 

From a personal perspective, learning how to invest using Bogle’s approach was a turning point in my life. I quickly realised there was no point chasing returns and paying expensive advisers or platforms. Once money is taken care off, you can work on what truly matters, such as family, relationships or other projects. I owe Jack Bogle for that.”

• Sam Instone, director of financial advisory firm AES International

"Thought to have saved investors over a trillion dollars, Jack Bogle’s ideas truly changed the way the world invests. Shaped by his own personal experiences, his philosophy and basic rules for investors challenged the status quo of a self-interested global industry and eventually prevailed.  Loathed by many big companies and commission-driven salespeople, he has transformed the way well-informed investors and professional advisers make decisions."

• Demos Kyprianou, a board member of SimplyFI.org

"Jack Bogle for me was a rebel, a revolutionary who changed the industry and gave the little guy like me, a chance. He was also a mentor who inspired me to take the leap and take control of my own finances."

• Steve Cronin, founder of DeadSimpleSaving.com

"Obsessed with reducing fees, Jack Bogle structured Vanguard to be owned by its clients – that way the priority would be fee minimisation for clients rather than profit maximisation for the company.

His real gift to us has been the ability to invest in the stock market (buy and hold for the long term) rather than be forced to speculate (try to make profits in the shorter term) or even worse have others speculate on our behalf.

Bogle has given countless investors the ability to get on with their life while growing their wealth in the background as fast as possible. The Financial Independence movement would barely exist without this."

• Zach Holz, who blogs about financial independence at The Happiest Teacher

"Jack Bogle was one of the greatest forces for wealth democratisation the world has ever seen.  He allowed people a way to be free from the parasitical "financial advisers" whose only real concern are the fat fees they get from selling you over-complicated "products" that have caused millions of people all around the world real harm.”

• Tuan Phan, a board member of SimplyFI.org

"In an industry that’s synonymous with greed, Jack Bogle was a lone wolf, swimming against the tide. When others were incentivised to enrich themselves, he stood by the ‘fiduciary’ standard – something that is badly needed in the financial industry of the UAE."

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BEETLEJUICE BEETLEJUICE

Starring: Winona Ryder, Michael Keaton, Jenny Ortega

Director: Tim Burton

Rating: 3/5

Monday's results
  • UAE beat Bahrain by 51 runs
  • Qatar beat Maldives by 44 runs
  • Saudi Arabia beat Kuwait by seven wickets
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Results

1. New Zealand Daniel Meech – Fine (name of horse), Richard Gardner – Calisto, Bruce Goodin - Backatorps Danny V, Samantha McIntosh – Check In. Team total First round: 200.22; Second round: 201.75 – Penalties 12 (jump-off 40.16 seconds) Prize €64,000

2. Ireland Cameron Hanley – Aiyetoro, David Simpson – Keoki, Paul Kennedy – Cartown Danger Mouse, Shane Breen – Laith. Team total 200.25/202.84 – P 12 (jump-off 51.79 – P17) Prize €40,000

3. Italy Luca Maria Moneta – Connery, Luca Coata – Crandessa, Simone Coata – Dardonge, Natale Chiaudani – Almero. Team total 130.82/198.-4 – P20. Prize €32,000

The specs

  Engine: 2-litre or 3-litre 4Motion all-wheel-drive Power: 250Nm (2-litre); 340 (3-litre) Torque: 450Nm Transmission: 8-speed automatic Starting price: From Dh212,000 On sale: Now

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The Buckingham Murders

Starring: Kareena Kapoor Khan, Ash Tandon, Prabhleen Sandhu

Director: Hansal Mehta

Rating: 4 / 5

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