The Dodo Blog

What is a dodo according to Classic Encyclopedia, based on the 11th Edition of the Encyclopaedia Britannica (pub. 1911):

DODO (from the Portuguese Doudo, a simpleton), a large bird formerly inhabiting the island of Mauritius, but now extinct – the Didus ineptus of Linnaeus. When, in 1507, the Portuguese discovered the island which we now know as Mauritius they named it Ilha do from a notion that it must be the island of that name mentioned by Pliny; but most authors have insisted that it was known to the seamen of that nation as Ilha do Cisne- perhaps but a corruption of Cerne, and brought about by their finding it stocked with large fowls, which, though not aquatic, they likened to swans, the most familiar to them of bulky birds. In 1598 the Dutch, under Van Neck, took possession of the island and renamed it Mauritius. A narrative of this voyage was published in 1601, if not earlier, and has been often reprinted. Here we have birds spoken of as big as swans or bigger, with large heads, no wings, and a tail consisting of a few curly feathers. The Dutch called them Walgvogels (the word is variously spelled), i.e. nauseous birds, either because no cooking made them palatable, or because this island-paradise afforded an abundance of fare so much superior. De Bry gives two admirably quaint prints of the doings of the Hollanders, and in one of them the Walgvogel appears, being the earliest published representation of its unwieldy form, with a footnote stating that the voyagers brought an example alive to Holland. Among the company there was a draughtsman, and from a sketch of his, Clusius, a few years after, gave a figure of the bird, which he vaguely called “Gallinaceus Gallus peregrines,” but described rather fully. Meanwhile two other Dutch fleets had visited Mauritius. One of them had rather an accomplished artist on board, and his drawings fortunately still exist (see article Bird). Of the other a journal kept by one of the skippers was subsequently published.

This in the main corroborates what has been before said of the birds, but adds the curious fact that they were now called by some Dodaarsen and by others Dronten. 1 Henceforth Dutch narrators, though several times mentioning the bird, fail to supply any important fact in its history. Their navigators, however, were not idle, and found work for their naturalists and painters. Clusius says that in 1605 he saw at Pauw’s House in Leyden a dodo’s foot, 2 which he minutely describes. In a copy of Clusius’s work in the high school of Utrecht is pasted an original drawing by Van de Venne superscribed “Vera effigies huius avis Walghvogel (quae & a nautis Dodaers propter foedam posterioris partis crassitiem nuncupatur), qualis viva Amsterodamum perlata est ex insula Mauritii. Anno M.DC.XXVI.” Now a good many paintings of the dodo drawn from life by Roelandt Savery

(1576-1639) exist; and the paintings by him at Berlin and Vienna – dated 1626 and 1628 – as 1 The etymology of these names has been much discussed. That of the latter, which has generally been adopted by German and French authorities, seems to defy investigation, but the former has been shown by Prof. Schlegel (Versl. en Mededeel. K. Akad. Wetensch. ii. pp. 255 et seq.) to be the homely name of the dabchick or little grebe (Podiceps minor), of which the Dutchmen were reminded by the round stern and tail diminished to a tuft that characterized the dodo. The same learned authority suggests that dodo is a corruption of Dodaars, but, as will presently be seen, we herein think him mistaken.

And that is just the first part of the article. The image used to illustrated is the Solitaire of Rodriguez (Pezophaps solitarius), from Leguat’s figure, and that’s the reason:

The dodo is said to have inhabited forests and to have laid one large white egg on a mass of grass. Besides man, hogs and other imported animals seem to have exterminated it. But the dodo is not the only member of its family that has vanished. The little island which has successively borne the name of Mascaregnas, England’s Forest, Bourbon and Reunion, and lies to the southward of Mauritius, had also an allied bird, now dead and gone. Of this not a relic has been – handled by any naturalist. The latest description of it, by Du Bois in 1674, is very meagre, while Bontekoe (1646) gave a figure, apparently intended to represent it. It was originally called the “solitaire,” but this name was also applied to Pezophaps solitarius of Rodriguez by the Huguenot exile Leguat, who described and figured it about 1691.

The solitaire, Didus solitarius of Gmelin, referred by Strickland to a district genus Pezophaps, is supposed to have lingered in the 3 E. Newton and H. Gadow, Trans. Zool. Soc. xiii. (1893) island of Rodriguez until about 1761. Leguat l has given a delightful description of its quaint habits. The male stood about 2 ft. 9 in. high; its colour was brownish grey, that of its mate more inclined to brown, with a whitish breast. The wings were rudimentary, the tail very small, almost hidden, and the thigh feathers were thick and curled “like shells.” A round mass of bone, “as big as a musket ball,” was developed on the wings of the males, and they used it as a weapon of offence while they whirled themselves about twenty or thirty times in four or five minutes, making a noise with their pinions like a rattle. The mien was fierce and the walk stately, the birds living singly or in pairs. The nest was a heap of palm leaves a foot high, and contained a single large egg which was incubated by both parents. The food consisted of seeds and leaves, and the birds aided digestion by swallowing large stones; these were used by the FIG. 3. – Skeleton of a male Solitaire, Pezophaps solitarius, Museum of Zoology, Cambridge.

A New York Times‘ article from July about the new expedition to explore Mauritius’ sites: Newfound Island Graveyard May Yield Clues to Dodo Life of Long Ago:

The origins of the dodo are mysterious. Studies on its DNA indicate that it descended from pigeons. The dodo’s closest relative was the solitaire, another extinct flightless bird that lived only on the nearby island of Rodrigues. [...]

Plant-eating mammals play a major role in shaping their ecosystems. Dodos may have thinned the Mauritius forests, and some plants may have come to depend on them to spread their seeds.

With almost no fossils to study, scientists had been unable to test these ideas. Now it will be possible, thanks to the discovery of the dodo graveyard. Dr. Rijsdijk and Frans Bunnik, also of the Geological Survey of the Netherlands, found it almost by accident. [...]

Based on the underlying geology of the site, Dr. Rijsdijk estimates that it is 3,000 years old. More precise dating based on carbon isotopes is now under way.

Dr. Rijsdijk said that the fossils appeared to have formed in a forest lake. A big storm may have washed the animals and plants into the lake, where their bones settled into a single layer.

“Think of it like a snapshot,” Dr. Burney of Fordham said. “You set up a big camera and photograph the landscape at a particular instance. You’ve got the dodos and the other species, all captured in a moment.”

The scientists are now studying the material more carefully. Some are looking for ancient DNA, while others will analyze the dodo bones to get clues to their diet. “We may be really be able to shine a light on the dodo’s role in the ecosystem,” Dr. Rijsdijk said. The scientists will present early findings at the University of Oxford in September and will return to Mare aux Songes in 2007.

By understanding the Mauritius ecosystem before humans arrived, they hope to find clues to the dodo’s extinction. Dodos were easy to hunt, but hunting alone probably did not wipe them out. Recent research indicates that the early Dutch settlers rarely ate dodo meat. Nor did the deforestation of the island doom the dodo. Major forest clearing did not begin until after the dodo became extinct.

BTW, use Firefox and the bug me not extension to read the article if you don’t want to create an account there.

From Scientific American an interesting article about birds and dodos too: Bird Extinction Estimates May Be Too Low.

Since 1500, more than 150 bird species have disappeared from the world, including the much lamented dodo. This ground bird disappeared from its island home before Carl Linnaeus, the father of scientific taxonomy, even described it in the 18th century. Given that many of the nearly 10,000 known bird species have only recently been described–including those only available from remains like the dodo–some biologists suggest that current extinction rates have been seriously underestimated and will rise rapidly in the coming century.

Stuart Pimm of Duke University and his colleagues analyzed current estimates of bird extinction rates. Out of 9,975 known bird species, 154 have disappeared, or roughly 1.3 percent. Extrapolated, this yields an estimate of 26 extinctions per million bird species every year. Based on fossil records, scientists estimate that normal extinction rates average just one lost animal for every million species per year.

Read the whole article here.

Bringing the dodo back to life …, an excellent article by By Steve Connor, from The New Zealand Herald, about this new expedition:

Much of what is known about the appearance of the dodo comes from contemporary drawings and paintings. But these were often inaccurate, subject to the fashions of the time – such as the 17th century predilection for painting over-plump birds.

“The dodo, one of the most documented and famous of birds and a leading contender as the icon of extinction, has endured more than its fair share of overzealous misinterpretation,” said Dr Hume.

In fact, it became so mythologised that some 19th-century scholars began to doubt that it ever existed, believing that the rather poorly preserved specimens were elaborate hoaxes.

In fact all of these specimens were made from the incomplete skeletons of many different individuals. Trying to guess what the real dodo looked like was an uphill struggle.

One problem was its weight. Many of the early paintings depict it as an overweight, almost obese creature that could barely support itself. But, at least one illustration dating from the first Dutch exploration depicts the dodo as a rather slim, even nimble bird.

In reality, it is possible that the dodo was both fat and slim. In other words it may have been adapted to putting on weight quickly in times of plenty – during the wet season, for instance, when there was lots of ripe fruit to eat – which would have allowed it to survive the leaner times of the dry season.

Dodos kept in captivity could just have been overfed, which is why they tended to look much fatter than other birds of a similar shape and size.