How an Island Full of Landmines Led to a Thriving Penguin Population

iStock/JeremyRichards
iStock/JeremyRichards

by Hank Green

War—what is it good for? Well, if the Falkland Islands are any indication, it certainly helps penguins.

For several hundred years, human activity on the Falkland Islands—roughly 300 miles off the Argentine coast—threatened its penguins’ survival. But that trend started to reverse in 1982, when Argentina and Britain began duking it out for control of the Falklands. Turns out, a war, a few landmines, and some unstable diplomatic relations might have been just enough to get the penguins back on track.

The Falkland Islands are small. Collectively, the 200-plus islands that make up the Falklands are only about as big as Connecticut. But through the years, they’ve managed to inspire some Texas-size international contention. Ever since Argentina gained independence from Spain in 1816, it’s been vying for control of the Falklands in one form or another. Some Argentines even claim possession of the region today, even though Queen Elizabeth’s face graces the currency, the Union Jack appears on the official flag, and every other government recognizes British rule over the Falklands. Despite the fact that Argentina famously lost its military bid for control of the islands back in 1982, national polls still show that 80 percent of Argentines want their government to take back the Islas Malvinas, as they’re known in the Spanish-speaking nation.

So what is it the Argentines so jealously covet? Hard to say. The Falkland Islands aren’t home to much, other than about 3,000 humans, 700,000 sheep, and a few fishing installations. What they do have, however, is an enormous population of penguins from five different species—the Southern Rockhoppers, the Magellanic, the King, the Gentoo, and the Macaroni. Their names derive from, respectively, the ability to hop on rocks, a celebrated circumnavigator, a British ruler, a religious slur, and a slang reference to flashy dressers. With these five species combined, the Falklands are home to a penguin army more than 1 million strong. That’s pretty impressive, but it’s believed the number was closer to 10 million only 300 years ago.

In the 18th century, the whale oil industry was booming, and the Falklands had their fair share of whales. Not coincidentally, French, British, and Spanish groups began showing up on the islands to get in on the action. But whale oil isn’t exactly the easiest thing to produce. First, whales are brought ashore. Then their blubber is separated from their bodies, and the fat is rendered into oil in gigantic vats of boiling water. The Falkland Islands had plenty of whales, but they’re mostly void of timber, and burning whale oil to render whale oil seemed a little silly. So how did the settlers make their Falkland outposts survive? “François, throw another penguin on the fire!” Yes, as it turned out, penguins made surprisingly good kindling, thanks to layers of protective (and, apparently, highly flammable) fat beneath their skin. And it didn’t hurt that they’re so easy to catch. Penguins are flightless and unafraid of humans, so anytime the rendering fires got low, whalers simply grabbed a penguin or two and tossed ’em in.

One Fish, Two Fish

Fortunately for the penguins, the whale oil business died out in the 1860s with the discovery of fossil fuels. That left the islands with little commercial industry, and the worst thing the penguins had to worry about for a while was the occasional egg theft. But peaceful human-penguin relations hit a roadblock again in 1982, when Argentina made its ill-fated attempt to reclaim the Falklands.

Although the British presence on the Falkland Islands had long been a sore spot for Argentina, no Argentine leader had ever tried to force a national claim to the land. At the time, however, the military government, led by General Leopoldo Galtieri, was in a unique situation. Already unpopular at home because of his habit of kidnapping and killing opposition leaders, Galtieri started to get truly nervous when the Argentine economy began to sink. Fearing outright rebellion, Galtieri tried to enlist the spirit of nationalism by invading the largely unprotected Falklands on April 2. He quickly declared victory over the British, but his success was short-lived. Unfortunately for Galtieri, British Prime Minister Margaret Thatcher didn’t believe in capitulating to dictators, even regarding land as inconsequential and unprofitable as the Falklands. The United Kingdom quickly struck back. In the ensuing two-month conflict, more than 1,000 Argentine servicemen died, and Galtieri’s political downfall was solidified.

When the dust cleared, Britain’s leaders realized they’d just spent several million pounds to assert control over the Falklands, and it was probably in their best interest to find some way to prove to the public that the expense had been worthwhile. Fishing seemed like the best way to make the Falklands economically self-sufficient, so the British government set up an exclusive fishing zone around the islands and began selling permits to everyone from local islanders to gigantic international fishing companies. It was a fine plan, except that the penguins relied on those same fish for survival. Before long, competing with humans for food had become a far greater threat to the penguins than whaling had ever been. In a single decade, the Islands’ penguin population dropped from more than 6 million to fewer than 1 million.

The Spoils of War

The Falkland Islands War, and the dwindling supply of fish that came with it, seriously threatened the local penguins. But, ironically enough, it also led to their gradual comeback. Since the dispute, Britain and Argentina have approached one another on diplomatic eggshells, if at all. As a result, neither side has been willing to risk angering the other by drilling for oil off the Falklands’ coast—even though experts estimate that 11 billion barrels worth of oil lie buried out there. That’s good news for all of penguinkind. In other parts of the world, even small amounts of oil leaked from drilling stations have proven disastrous for penguins. The flightless birds rely on a very specific balance of oils in their feathers in order to maintain perfect buoyancy. When mixed with crude oil, penguins will either sink and drown or float and starve. But as long as tensions remain high between the two nations, the Falklands penguins are in the clear.

The Falklands War also left the penguins with a bizarre kind of habitat protection. During Argentina’s occupation of the islands, its military laid down landmines along the beaches and pastureland near the capital city to deter the British from reclaiming the area. So far, these landmines haven’t killed anyone, but the well-marked and fenced-off explosive zones have made for prime penguin habitat. The penguins aren’t heavy enough to set off the mines, but because sheep and humans are, the little guys have the minefields all to themselves.

Today, there are still an estimated 20,000 landmines on the Falkland Islands. Over the years, they’ve come in pretty handy not only for protecting the penguin habitat from over-grazing, but also for keeping out overzealous tourists. Consequently, Falkland Islanders have decided that maybe having landmines isn’t such a bad thing. After all, signs warning “Keep away from the penguins” will never be as effective as “Keep away from the penguins—or die.”

Chimpanzees Bond by Watching Movies Together, Too

Windzepher/iStock via Getty Images
Windzepher/iStock via Getty Images

Scientists at the Wolfgang Kohler Primate Research Center in Germany recently discovered that, like humans, chimpanzees bond when they watch movies together, the BBC reports.

In the study, published in Proceedings of the Royal Society B, researchers stationed pairs of chimpanzees in front of screens that showed a video of a family of chimps playing with a young chimp. They found that afterward, the chimps would spend more time grooming and interacting with each other—or simply being in the same part of the room—than they would without having watched the video.

They gave the chimps fruit juice to keep them calm and occupied while they viewed the video, and they chose a subject that chimps have previously proven to be most interested in: other chimps. They also used eye trackers to ensure the chimps were actually watching the video. If you’ve ever watched a movie with friends, you might notice similarities between the chimps’ experience and your own. Drinks (and snacks) also keep us calm and occupied while we watch, and we like to watch movies about other humans. Since this study only showed that chimps bond over programs about their own species, we don’t know if it would work the same way if they watched something completely unrelated to them, like humans do—say, The Lion King.

Bonding through shared experiences was thought to be one of the traits that make us uniquely human, and some researchers have argued that other species don’t have the psychological mechanisms to realize that they’re even sharing an experience with another. This study suggests that social activities for apes don’t just serve utilitarian purposes like traveling together for safety, and that they’re capable of a more human-like social closeness.

The part that is uniquely human about this study is the fact that they were studying the effect of a screen, as opposed to something less man-made. The chimps in question have participated in other studies, so they may be more accustomed to that technology than wild apes. But the study demonstrates that we’re not the only species capable of social interaction for the sake of social interaction.

[h/t BBC]

10 Facts You Should Know About Mosquitoes

tskstock/iStock via Getty Images
tskstock/iStock via Getty Images

Between the itching and the welts and the fears of mosquito-borne viruses, it's easy to forget that mosquitoes are a wonder of evolution, and that maybe they don't get a fair shake from us. Of more than 3000 known species, only 80 actually bite people, and at least one eats other mosquitoes for us. They grow from egg to adult in just five days, begin mating within minutes of hatching, and possess, by way of their stinging mouthparts, some of the coolest appendages in the animal kingdom.

1. Mosquitoes are excellent flyers in bad weather.

The average raindrop is 50 times heavier than the average mosquito, yet they buzz around in the rain with no problems. If a Boeing 747 got whacked with a similarly scaled-up raindrop, there would be 2375 tons of water coming down on it, and things probably wouldn’t turn out as well as they do for the mosquito. How do the insects do it?

A common urban legend said that the bugs were nimble enough to dodge the drops. A few years ago, a team of engineers from the Georgia Institute of Technology watched real mosquitoes and Styrofoam dummy mosquitoes with a high-speed camera during a rainy flight to see if that’s what was really happening. They found that the bugs don’t fly fast enough to dodge the drops, but their slowness is what keeps them from getting knocked out of the sky. A mosquito’s low mass even at slow speed doesn’t provide enough of a target for a raindrop to splash on collision. Instead, the drop just deforms, and doesn’t transfer enough momentum to the mosquito to disrupt its flight.

2. Texas is the mosquito capital of America.

Of the 3000 species of mosquitoes around the world, at least 150 are found in the United States, and 85 of those call Texas home. When people say everything's bigger in Texas, you can also include the biodiversity of the state's biting, disease-carrying insects.

3. Some mosquitoes are truly dangerous to humans ...

The female mosquito, which is the one that stings and sucks blood, is an incredible transmitter of disease and, because of that, the deadliest animal in the world. Each year, the malaria parasites they transmit kill 2 million to 3 million people and infect another 200 million or more. They also spread pathogens that cause yellow fever, dengue fever, Rift Valley fever, Chikungunya and West Nile disease.

4. ... and some mosquitoes are harmless.

Not every species of mosquito sucks blood from people, and among those that do, not every one transmits disease. The blood suckers don’t even need to bite you for every meal. Males live entirely on nectar and other plant fluids, and the females’ diet is primarily plant-based, too. Most of the time, they only go after people when they’re ready to reproduce, because blood contains lipids, proteins, and other nutrients needed for the production of eggs.

5. MosquitoEs actually help the environment.

When you’re rubbing calamine lotion all over yourself, mosquitoes might not seem to serve any purpose but to annoy you, but many species play important ecological roles. The mosquitoes Aedes impiger and Aedes nigripes, which gather in thick clouds in Arctic Russia and Canada, are an important food source for migrating birds. Farther south, birds, insects, spiders, salamanders, lizards, frogs, and fish also eat different mosquito species regularly. Plants need them, too, and some, like the blunt-leaved orchid and endangered monkeyface orchid, rely on mosquitoes as their primary pollinator.

Some mosquito species are also excellent at mosquito control. Species of the genus Toxorhynchites feed on the larvae and immature stages of other mosquitoes and will sometimes even cannibalize members of their own species.

6. Mosquitoes are amazing hunters (as if we needed to tell you that).

Mosquitoes are adept at picking up on the chemicals given off by their human hosts. They can detect the carbon dioxide in our breath, the 1-octen-3-ol in our breath and sweat, and other organic substances we produce with the 70-plus types of odor and chemical receptors in their antennae. These receptors can pick up traces of chemicals from hundreds of feet away, and once the mosquito closes in, it tracks its meal chemically and also visually—and they’re fond of people wearing dark colors.

7. Mosquitoes can be picky.

If it seems like you’re always covered head to toe by bites while people who were sitting right next to you only have one or two, it’s not just paranoia; the skeeters actually are out to get you. Some people happen to give off more of the odors and compounds that mosquitoes find simply irresistible, while others emit less of those and more of the compounds that make them unattractive to mosquitoes—either by acting as repellents or by masking the compounds that mosquitoes would find attractive.

8. A female mosquito's mouth is primed for sucking blood.

A mosquito doesn’t simply sink its proboscis into your skin and start sucking. What you see sticking out of a mosquito’s face is the labium, which sheaths the mouthparts that really do all the work. The labium bends back when a mosquito bites, allowing these other parts to pass through its tip and do their thing. The sharp, pointed mandibles and maxillae, which both come in pairs, are used to pierce the skin, and the hollow hypopharynx and the labrum are used to deliver saliva and draw blood, respectively.

9. Mosquito saliva prevents blood clotting.

The saliva that gets pumped out from the hypopharynx during a bite is necessary to get around our blood’s tendency to clot. It contains a grab bag of chemicals that suppress vascular constriction, blood clotting and platelet aggregation, keeping our blood from clogging up the mosquitoes' labrum and ruining their meal.

10. Mosquitoes can explode.

Blood pressure makes a mosquito's meal easier by helping to fill its stomach faster, but urban legend says it can also lead to their doom. Story goes, you can flex a muscle close to the bite site or stretch your skin taut so the mosquito can’t pull out its proboscis and your blood pressure will fill the bug until it bursts. The consensus among entomologists seems to be that this is bunk, but there is a more complicated way of blowing the bugs up. To make a blood bomb, you’ve got to sever the mosquito’s ventral nerve cord, which transmits information about satiety. When it's cut, the cord can’t tell the mosquito’s brain that its stomach is full, so it’ll keep feeding until it reaches critical mass. At least one researcher found that mosquitoes clueless about how full they were would keep sucking even after their guts had exploded, sending showers of blood spilling out of their blown-out back end.

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