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Honey bees have 30 percent better Eyesight than previously recorded: Study

The findings suggest that honey bees can spot a potential predator, and thus escape, far earlier than what we thought previously

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Honey bee, Wikimedia
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Sydney April 7, 2017: Honey bees have 30 per cent better eyesight than has been previously recorded, suggest results of “eye tests” given to the flying insects.

The findings suggest that they can spot a potential predator, and thus escape, far earlier than what we thought previously.

The researchers believe that the results, published in the journal Scientific Reports, could provide insights into the lives of honey bees, and new opportunities for translating this knowledge into fields such as robot vision.

“We’ve shown that the honey bee has higher visual acuity than previously reported. They can resolve finer details than we originally thought,” said one of the researches Steven Wiederman from Adelaide Medical School, University of Adelaide in Australia.

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“Importantly, these findings could also be useful in our work on designing bio-inspired robotics and robot vision, and for basic research on bee biology,” he added.

The researchers set out to answer two specific questions: first, what is the smallest well-defined object that a bee can see? (its object resolution); and second, how far away can a bee see an object, even if it cannot see that object clearly? (maximum detectability limit).

To do so, the researchers took electrophysiological recordings of the neural responses occurring in single photoreceptors in a bee’s eyes.

The photoreceptors are detectors of light in the retina, and each time an object passes into the field of vision, it registers a neural response.

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“We found that in the frontal part of the eye, where the resolution is maximised, honey bees can clearly see objects that are as small as 1.9 degree — that’s approximately the width of your thumb when you stretch your arm out in front of you,” Elisa Rigosi from Lund University in Sweden said.

This is 30 per cent better eyesight than has been previously recorded, she said.

“In terms of the smallest object a bee can detect, but not clearly, this works out to be about 0.6 degree — that’s one third of your thumb width at arm’s length,” Rigosi said.

“These new results suggest that bees have the chance to see a potential predator, and thus escape, far earlier than what we thought previously, or perceive landmarks in the environment better than we expected, which is useful for navigation and thus for survival,” she added.

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This research offers new and useful information about insect vision more broadly as well as for honey bees, Wiederman said. (IANS)

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Can Flourishing Islamic State (ISIS) be Stopped in Afghanistan?

The truth about IS and Afghanistan is definitely no picnic

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Taliban fighters react to a speech by their senior leader in the Shindand district of Herat province, Afghanistan, May 27, 2016.
Taliban fighters react to a speech by their senior leader in the Shindand district of Herat province, Afghanistan, May 27, 2016. The rise of IS in Afghanistan has become such a priority that U.S. and Afghan forces sometimes support the Taliban while battling IS, VOA
  • Depending on the location, the proliferation of IS has drawn varied resistance from the Afghan military, U.S. air support and ground troops, local militias, Taliban forces and other militant groups
  • Afghan army planes on Wednesday night accidentally air dropped vital supplies of food and water to IS militants in the Darzab district of northern Jouzjan province instead of to their own besieged troops
  • In the Tora Bora area, where IS has made a strong stand in recent days, local villagers and militias joined with Taliban to rout IS

June 25, 2017: The Islamic State group is rapidly expanding in parts of Afghanistan, advancing militarily into areas where it once had a weak presence and strengthening its forces in core regions, according to Afghan and U.S. officials.

Depending on the location, the proliferation of IS has drawn varied resistance from the Afghan military, U.S. air support and ground troops, local militias, Taliban forces and other militant groups.

Attacking IS has become such a priority in the country, that disparate forces sometimes join together in the ad-hoc fight, with Afghan and U.S. forces finding themselves inadvertently supporting the enemy Taliban in battling IS.

Confusion leads to mistakes

All too often, officials say, mistakes are made due to confusion on the ground.

Afghan army planes on Wednesday night accidentally air dropped vital supplies of food and water to IS militants in the Darzab district of northern Jouzjan province instead of to their own besieged troops, provincial police chief, Rahmatullah Turkistani told VOA. The supplies were meant to help Afghan forces that are countering twin attacks by IS and Taliban militants but were used instead by IS.

“It’s not getting better in Afghanistan in terms of IS,” U.S. Chief Pentagon Spokeswoman Dana White told VOA this week. “We have a problem, and we have to defeat them and we have to be focused on that problem.”

Reinforcements for the IS cause reportedly are streaming into isolated areas of the country from far and wide. There are reports of fighters from varied nationalities joining the ranks, including militants from Pakistan, India, Iran, Iraq, Syria, Russia and Central Asian neighbors.

Confusing scenarios

Still, the Islamic State-Khorasan (ISK) as IS is known in Afghanistan remains a fragmented group composed of differing regional forces with different agendas in different parts of the country.

“IS-K is still conducting low-level recruiting and distribution of propaganda in various provinces across Afghanistan, but it does not have the ability or authority to conduct multiple operations across the country,” a recent Pentagon report said. But where it operates, IS is inflicting chaos and casualties and causing confusing scenarios for disparate opponents.

In the Tora Bora area, where IS has made a strong stand in recent days, local villagers and militias joined with Taliban to rout IS. IS regained ground after a few days, leading to U.S. military air attacks on IS positions in conjunction with Afghan intelligence instructions and army operations.

IS fighters reportedly have fled from mountain caves of Tora Bora, where al-Qaida’s leader Osama bin Laden hid from U.S. attack in 2001.

Families displaced

IS fighters were also reportedly advancing in neighboring Khogyani district, displacing hundreds of families, according to district officials. It is one of several areas in Nangarhar province, near the Pakistani border, where IS has been active for over two years.

Fierce clashes in the Chaparhar district of Nangarhar last month left 21 Taliban fighters and seven IS militants dead, according to a provincial spokesman. At least three civilians who were caught in the crossfire were killed and five others wounded.

“IS has overpowered Taliban in some parts of Nangarhar because the Taliban dispatched its elite commando force called Sara Qeta (Red Brigade) to other parts of the country, including some northern provinces to contain the growing influence of IS there,” Wahid Muzhda, a Taliban expert in Kabul, told VOA.

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Recruiting unemployed youths

IS has also expanded in neighboring Kunar province, where, according to provincial police chief, it has a presence in at least eight districts and runs a training base, where foreign members of IS, train new recruits.

Hundreds of miles from Nangarhar, IS is attempting to establish a persistent presence in several northern provinces where it has found a fertile ground for attracting militants and recruiting unemployed youths, mostly between the age of 13 and 20.

IS has been able to draw its members from the Pakistani Taliban fighters, former Afghan Taliban, and other militants who “believe that associating with or pledging allegiance” to IS will further their interests, according to the Pentagon report.

Hundreds of militants have joined IS ranks in northern Jouzjan and Sar-e-Pul province where local militant commanders lead IS-affiliate groups in several districts.

Darzab district

Qari Hekmat, an ethnic Uzbek and former Taliban militant who joined IS a year ago, claims to have up to 500 members, including around 50 Uzbek nationals who are affiliated with the Islamic Movement of Uzbekistan (IMU) — previously associated with al-Qaida and Taliban in Afghanistan.

IS and Taliban are reportedly fighting over the control of Darzab district in Jouzjan which they stormed this week from two different directions and besieged scores of government forces. The Taliban has reportedly captured the center of the district while IS militants control the city outskirts.

Afghanistan faces a continuing threat from as many as 20 insurgent and terrorist networks present or operating in the Afghanistan-Pakistan region, including IS, the Pentagon said.

“In areas where the government has limited influence and control, IS attempts to emerge and expand there,” Ateequllah Amarkhail, an analysts and former Army general in Kabul told VOA.

Hit-and-hide strategy

IS has also claimed responsibility for several recent attacks in urban areas, however, with a hit-and-hide strategy that is proving effective. And it is engaging too in more skirmishes with U.S. forces that initially were sent to the country to help Afghan forces halt the spread of Taliban.

Three American service members based in eastern Afghanistan were killed in April during operations targeting IS militants, according to the Pentagon.

“ISIS-K remains a threat to Afghan and regional security, a threat to U.S. and coalition forces, and it retains the ability to conduct high-profile attacks in urban centers,” the Pentagon said. (VOA)