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11 Things We Know About the Dodo

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Wikimedia Commons

The first thing one must accept when trying to learn about the dodo is that we’ll probably never know that much about the flightless bird, which died out over 300 years ago in one of the first—if not the first—man-made extinctions. Still, careful study of surviving documents and specimens, as well as a little science, have revealed a bit about the dodo. 

1. The Dodo lived on Mauritius.

A map of the Mascarene Islands, circa 1780: Reunion (then Ile. Bourbon, left), Mauritius (then Ile. de France, center) and Rodrigues (right). Image courtesy of Wikimedia Commons.

Part of a chain of three islands east of Madagascar in the Indian Ocean, Mauritius was discovered by the Portuguese in 1507; they set up a base but soon abandoned the island. But it was the Dutch who named it, after Prince Maurice van Nassau, in 1598—which was also when they found the dodo. Vice Admiral Wybran van Warwijck described the bird in his journal: 

Blue parrots are very numerous there, as well as other birds; among which are a kind, conspicuous for their size, larger than our swans, with huge heads only half covered with skin as if clothed with a hood. These birds lack wings, in the place of which 3 or 4 blackish feathers protrude. The tail consists of a few soft incurved feathers, which are ash coloured.

In 1634, Sir Thomas Herbert (who had visited Mariutius in 1627) described the dodo in his book A Relation of Some Yeares Travaille into Afrique and the Greater Asia:

First here only ... is generated the Dodo ... her body is round and fat, few weigh less than fifty pound. It is reputed more for wonder than for food, greasie stomackes may seeke after them, but to the delicate they are offensive and of no nourishment. Her visage darts forth melancholy, as sensible of Nature's injurie in framing so great a body to be guided with complementall wings, so small and impotent, that they serve only to prove her bird. The halfe of her head is naked seeming couered with a fine vaile, her bill is crooked downwards, in midst is the trill [nostril], from which part to the end tis a light green, mixed with pale yellow tincture; her eyes are small and like to Diamonds, round and rowling; her clothing downy feathers, her train three small plumes, short and inproportionable, her legs suiting her body, her pounces sharpe, her appetite strong and greedy. Stones and iron are digested, which description will better be conceived in her representation. 

He drew the bird, too.

2. Its moniker came from the Portuguese.

The Dutch called it walghvodel, or “disgusting bird,” because of the toughness of its flesh. “The longer and oftener they were cooked, the less soft and more insipid eating they became. Nevertheless their belly and breast were of a pleasant flavour and easily masticated,” van Warwijck wrote in 1598. But the name that stuck, according to Clara Pinto-Correia in her book Return of the Crazy Bird, was derived from the ancient Portuguese word dondo (the modern word is doido) meaning idiot or fool. Pinto-Correia also says that by the end of the 17th century, there were a staggering 78 words for the bird. It had a number of scientific names—Carl Linneaus tried to name it Didus ineptus, or "inept dodo," in 1766—but the one that stuck was Raphus cucullatus (Latin for "bustard" and "hooded," respectively), which was given to the dodo in 1760.

3. It may have been monogomous.

It was described as "loyal to its mate and dedicated to its chicks." They also may have lain only one egg at a time in ground nests. That slow reproduction (as well as the fact that the eggs made for easy meals for predators) spelled disaster for the species.

4. Though placid and unafraid of humans, the Dodo was capable of defending itself.

In Crazy Bird, Pinto-Correia relates the slaughter of the dodos, which was occurring long before anyone settled at Mauritius; in one account, sailors killed as many as 25 birds to bring back to the ship. But there is one description of the birds fighting back: "One sailor wrote that if the men were not careful, the birds inflicted severe wounds upon their aggressors with their powerful beaks," Pinto-Correia writes. 

5. Dodos went to Europe.

No one knows for sure how many—Julian Pender Hume, an avian palentologist at the Natural History Museum in London, estimates that four or five were shipped with only one or two arriving alive, while others estimate that as many as 14 or 17 birds may have made the trip. But there is evidence at least a few made it there alive. One may have been brought to Europe by Admiral Jacob Cornelius van Neck, who sent the bird to Prague and Hapsburg Rudolf II, monarch of Austria and King of Bohemia and Hungary, in 1600 (more on that in a bit).

Theologian and writer Sir Hamon L’Estrange saw one dodo, displayed as a public attraction, in London in 1683. He wrote:

It was kept in a chamber, and was a great fowle somewhat bigger than the largest Turkey Cock, and so legged and footed, but stouter and thicker and of a more erect shape, coloured before like the breast of a young cock fesan, and on the back a dunn or deare colour. The keeper called it a Dodo, and in the ende of a chymney in the chamber there lay a heape of large pebble stones, wherof hee gave it many in our sight, some as big as nutmegs, and the keeper told us she eats them (conducing to digestion).

6. The dodo was illustrated as fat and awkward, but it (probably) wasn’t.

When we imagine a dodo, we often think of a depiction from one painting in particular—the one at the top of this post. It was created by Rudolf II's one-time court painter, Roelandt Savery, in 1626 (and gifted to the British Museum by George Edwards in 1759). According to Pinto-Correia, Savery left the court after Rudolf's death and afterward often painted the bird from memory, which probably led to inaccuracies. It's also not known if Savery painted a live bird or created his paintings from contemporary accounts and dead specimens.

At any rate, scientists believe the birds were probably drawn from overfed captive subjects or from overstuffed specimens; it's also possible that in the wild, the birds' weight fluctuated dramatically depending on the availability of food.

The first reconstruction of a dodo was put together in 1865 by Richard Owen at the Natural History Museum using fossilized bones and an outline of the bird from one of Savery's paintings. His reconstruction and a scientific description were published, but three years later, Owens realized he had been wrong. It was too late to change public perception, though. Modern evidence suggests that the dodo would have been more upright, with a thinner neck and breast—because flightless birds don't need large muscles in the breast.

7. The last Dodo was seen in July 1681.

Englishman Benjamin Harry, first mate on the British vessel Berkeley Castle, was the last person to spot a dodo on Mauritius and write about it:

Now having a little respitt I will make a little descripti: of ye island first of its Producks and yns of itts parts—ffirst of winged and feathered ffowle ye less passant, are Dodos whose fflesh is very hard, a small sort of Geese reasona...

Sometime after that—just eight decades after the Dutch landed—the bird succumbed to exctinction brought on by hunting, habitat destruction, and the introduction of invasive species like rats and pigs

8. There are no complete specimens from a single bird.

The mummified skin (top) and the dissected skull of the Oxford Dodo. Images courtesy the Oxford University Natural History Museum via this PDF.

The dodo skeletons you see at museums have been assembled from fossilized remains. At one point, though, there was a complete specimen. The bird belonged to John Tradescant and was gifted to the Oxford University Natural History Museum in the 1680s. Today, only the head—which still has soft tissue—and the foot remain; the museum burned the rest of the bird on January 8, 1755 because of severe decay, unaware that it was the last complete specimen in the world.

9. And many people didn’t believe it actually existed.

You can hardly blame naturalists living 150 years after the dodo's extinction for believing it was a creature made up by sailors. As Hugh Edwin Strickland and Alexander Melville wrote while making their case for the existence of the bird in The Dodo and Its Kindred, published in 1848:

So rapid and complete was their extinction that the vague descriptions given of them by early navigators were long regarded as fabulous or exaggerated, and these birds ... became associated in the minds of many person with the Griffin and the Phoenix of mythological antiquity.

10. It was basically a big pigeon.

During its life and after its extinction, scientists couldn't make up their minds just what kind of bird the dodo was—they grouped it with chickens, vultures, eagles, penguins, or cranes. But a few scientists, including Johannes Theodor Reinhardt, Hugh Edwin Strickland, Alexander Gordon Melville, and Samuel Cabot, thought the bird more closely resembled young pigeons—and they were right. In 2007, biologist Beth Shapiro performed analysis on a DNA sample carefully extracted from the leg bone of the Oxford remains and found that the dodo is a distant relative of the pigeon.

11. It had two cousins that also went extinct.

Wikimedia Commons

One was the solitaire (Pezophaps solitarius)—so named because it was rarely seen with other birds—a gray and brown flightless bird with a long neck, about the size of a swan, that lived on Rodrigues. It was wiped out by the 1760s. The other was the so-called "white dodo" of Réunion (Didus borbonicus, later called the Réunion Sacred Ibis,Threskiornis solitarius), a yellowish-white bird with black-tipped wings. In an account from 1614 (published in 1626), English sailor John Tatton described the bird as "a great fowl of the bigness of a Turkie, very fat, and so short-winged that they cannot fly, being white, and in a manner tame ... In general these birds are in such abundance in these islands that ten sailors can amass in one day enough to feed fourty." At least a couple of the birds were shipped to Europe in 1685, but after that, there are no more accounts; in an 1801 survey of Réunion, none of the birds were found.

Buy Clara Pinto-Correia's book, Return of the Crazy Bird—an invaluable resource for this article—for more about the dodo.

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Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
May 21, 2017
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iStock // Ekaterina Minaeva

Jacques Mattheij made a small, but awesome, mistake. He went on eBay one evening and bid on a bunch of bulk LEGO brick auctions, then went to sleep. Upon waking, he discovered that he was the high bidder on many, and was now the proud owner of two tons of LEGO bricks. (This is about 4400 pounds.) He wrote, "[L]esson 1: if you win almost all bids you are bidding too high."

Mattheij had noticed that bulk, unsorted bricks sell for something like €10/kilogram, whereas sets are roughly €40/kg and rare parts go for up to €100/kg. Much of the value of the bricks is in their sorting. If he could reduce the entropy of these bins of unsorted bricks, he could make a tidy profit. While many people do this work by hand, the problem is enormous—just the kind of challenge for a computer. Mattheij writes:

There are 38000+ shapes and there are 100+ possible shades of color (you can roughly tell how old someone is by asking them what lego colors they remember from their youth).

In the following months, Mattheij built a proof-of-concept sorting system using, of course, LEGO. He broke the problem down into a series of sub-problems (including "feeding LEGO reliably from a hopper is surprisingly hard," one of those facts of nature that will stymie even the best system design). After tinkering with the prototype at length, he expanded the system to a surprisingly complex system of conveyer belts (powered by a home treadmill), various pieces of cabinetry, and "copious quantities of crazy glue."

Here's a video showing the current system running at low speed:

The key part of the system was running the bricks past a camera paired with a computer running a neural net-based image classifier. That allows the computer (when sufficiently trained on brick images) to recognize bricks and thus categorize them by color, shape, or other parameters. Remember that as bricks pass by, they can be in any orientation, can be dirty, can even be stuck to other pieces. So having a flexible software system is key to recognizing—in a fraction of a second—what a given brick is, in order to sort it out. When a match is found, a jet of compressed air pops the piece off the conveyer belt and into a waiting bin.

After much experimentation, Mattheij rewrote the software (several times in fact) to accomplish a variety of basic tasks. At its core, the system takes images from a webcam and feeds them to a neural network to do the classification. Of course, the neural net needs to be "trained" by showing it lots of images, and telling it what those images represent. Mattheij's breakthrough was allowing the machine to effectively train itself, with guidance: Running pieces through allows the system to take its own photos, make a guess, and build on that guess. As long as Mattheij corrects the incorrect guesses, he ends up with a decent (and self-reinforcing) corpus of training data. As the machine continues running, it can rack up more training, allowing it to recognize a broad variety of pieces on the fly.

Here's another video, focusing on how the pieces move on conveyer belts (running at slow speed so puny humans can follow). You can also see the air jets in action:

In an email interview, Mattheij told Mental Floss that the system currently sorts LEGO bricks into more than 50 categories. It can also be run in a color-sorting mode to bin the parts across 12 color groups. (Thus at present you'd likely do a two-pass sort on the bricks: once for shape, then a separate pass for color.) He continues to refine the system, with a focus on making its recognition abilities faster. At some point down the line, he plans to make the software portion open source. You're on your own as far as building conveyer belts, bins, and so forth.

Check out Mattheij's writeup in two parts for more information. It starts with an overview of the story, followed up with a deep dive on the software. He's also tweeting about the project (among other things). And if you look around a bit, you'll find bulk LEGO brick auctions online—it's definitely a thing!

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8 Common Dog Behaviors, Decoded
May 25, 2017
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Dogs are a lot more complicated than we give them credit for. As a result, sometimes things get lost in translation. We’ve yet to invent a dog-to-English translator, but there are certain behaviors you can learn to read in order to better understand what your dog is trying to tell you. The more tuned-in you are to your dog’s emotions, the better you’ll be able to respond—whether that means giving her some space or welcoming a wet, slobbery kiss. 

1. What you’ll see: Your dog is standing with his legs and body relaxed and tail low. His ears are up, but not pointed forward. His mouth is slightly open, he’s panting lightly, and his tongue is loose. His eyes? Soft or maybe slightly squinty from getting his smile on.

What it means: “Hey there, friend!” Your pup is in a calm, relaxed state. He’s open to mingling, which means you can feel comfortable letting friends say hi.

2. What you’ll see: Your dog is standing with her body leaning forward. Her ears are erect and angled forward—or have at least perked up if they’re floppy—and her mouth is closed. Her tail might be sticking out horizontally or sticking straight up and wagging slightly.

What it means: “Hark! Who goes there?!” Something caught your pup’s attention and now she’s on high alert, trying to discern whether or not the person, animal, or situation is a threat. She’ll likely stay on guard until she feels safe or becomes distracted.

3. What you’ll see: Your dog is standing, leaning slightly forward. His body and legs are tense, and his hackles—those hairs along his back and neck—are raised. His tail is stiff and twitching, not swooping playfully. His mouth is open, teeth are exposed, and he may be snarling, snapping, or barking excessively.

What it means: “Don’t mess with me!” This dog is asserting his social dominance and letting others know that he might attack if they don’t defer accordingly. A dog in this stance could be either offensively aggressive or defensively aggressive. If you encounter a dog in this state, play it safe and back away slowly without making eye contact.

4. What you’ll see: As another dog approaches, your dog lies down on his back with his tail tucked in between his legs. His paws are tucked in too, his ears are flat, and he isn’t making direct eye contact with the other dog standing over him.

What it means: “I come in peace!” Your pooch is displaying signs of submission to a more dominant dog, conveying total surrender to avoid physical confrontation. Other, less obvious, signs of submission include ears that are flattened back against the head, an avoidance of eye contact, a tongue flick, and bared teeth. Yup—a dog might bare his teeth while still being submissive, but they’ll likely be clenched together, the lips opened horizontally rather than curled up to show the front canines. A submissive dog will also slink backward or inward rather than forward, which would indicate more aggressive behavior.

5. What you’ll see: Your dog is crouching with her back hunched, tail tucked, and the corner of her mouth pulled back with lips slightly curled. Her shoulders, or hackles, are raised and her ears are flattened. She’s avoiding eye contact.

What it means: “I’m scared, but will fight you if I have to.” This dog’s fight or flight instincts have been activated. It’s best to keep your distance from a dog in this emotional state because she could attack if she feels cornered.

6. What you’ll see: You’re staring at your dog, holding eye contact. Your dog looks away from you, tentatively looks back, then looks away again. After some time, he licks his chops and yawns.

What it means: “I don’t know what’s going on and it’s weirding me out.” Your dog doesn’t know what to make of the situation, but rather than nipping or barking, he’ll stick to behaviors he knows are OK, like yawning, licking his chops, or shaking as if he’s wet. You’ll want to intervene by removing whatever it is causing him discomfort—such as an overly grabby child—and giving him some space to relax.

7. What you’ll see: Your dog has her front paws bent and lowered onto the ground with her rear in the air. Her body is relaxed, loose, and wiggly, and her tail is up and wagging from side to side. She might also let out a high-pitched or impatient bark.

What it means: “What’s the hold up? Let’s play!” This classic stance, known to dog trainers and behaviorists as “the play bow,” is a sign she’s ready to let the good times roll. Get ready for a round of fetch or tug of war, or for a good long outing at the dog park.

8. What you’ll see: You’ve just gotten home from work and your dog rushes over. He can’t stop wiggling his backside, and he may even lower himself into a giant stretch, like he’s doing yoga.

What it means: “OhmygoshImsohappytoseeyou I love you so much you’re my best friend foreverandeverandever!!!!” This one’s easy: Your pup is overjoyed his BFF is back. That big stretch is something dogs don’t pull out for just anyone; they save that for the people they truly love. Show him you feel the same way with a good belly rub and a handful of his favorite treats.

The best way to say “I love you” in dog? A monthly subscription to BarkBox. Your favorite pup will get a package filled with treats, toys, and other good stuff (and in return, you’ll probably get lots of sloppy kisses). Visit BarkBox to learn more.

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