A common sight in cities around the world, Rock Pigeons crowd streets and public squares, living on discarded food and offerings of birdseed. In addition to the typical blue-gray bird with two dark wingbars, you'll often see flocks with plain, spotted, pale, or rusty-red birds in them. Introduced to North America from Europe in the early 1600s, city pigeons nest on buildings and window ledges. In the countryside they also nest on barns and grain towers, under bridges, and on natural cliffs.

Plump bird with small head and straight, thin bill. Plumage is variable, but most common form has gray back, 2 black bars in the wing, and blue-gray head.

Larger and plumper than a Mourning Dove, Rock Pigeons are tubby birds with small heads and short legs. Their wings are broad but pointed wings and the tail is wide and rounded.

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Nail art has been very popular in the world because of Newsday Indian woman are in nail extension trend so candidates interested in learning 3D nail art . Monark university is a collaboration between harshad bhatiya academy, A well-reputed cosmetic brand in the Indian beauty industry for the last 12 year and learning solution company. We provide all about the short-term certification courses offered in 3d nail art.

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Nail Structure
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Different type of nails, Shapes of Nails, brush work, the accessories used, glitter work, nail polish use, needle work, foil work, marble work, sponge work, acrylic extensions, French white powder, gel extension, Refills for gels.

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Playing brain games is an entertaining way to improve your cognitive abilities. To challenge your brain, try this spot-the-difference puzzle where you must identify at least three differences between two almost identical images in just 15 seconds.Read Less

Curious about plantains, the banana look-alikes in grocery stores? Here's a guide to the differences between plantains vs. bananas, including the most delicious ways to eat both fruits.

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New Zealand's giant flightless bird

New Zealand’s largest birds probably became extinct within one hundred years of humans first arriving in New Zealand, around 1300 A.D.. However, there were unsubstantiated sightings of moa by whalers and sealers into the 18th and even 19th centuries. Moa were a family of eleven species of flightless birds that were only found within New Zealand. The largest species grew up to 3.7 m (12 ft) tall and weight up to 230 kg (510 lb) – no wonder they were hunted by Maori! They were the only wingless birds known to have existed – even their cousin the flightless kiwi still has little vestigial wings hidden under its feathers. Prior to their extinction, they were the dominant plant-eater in New Zealand’s forests and only had one predator, Haast’s Eagle; the largest eagle ever known to exist and also the victim of extinction following the demise of the moa to hunting by Maori.



Photo by Sciencemag.org

Kiwi were long regarded as the closest relative to the moa, but recent studies suggest that either the Australia emu and cassowary or tinamous birds from South America are likely the closest cousins. Female moa grew considerably larger than their mates and weighed almost three times as much, in some cases. Although most images of reconstructed moa skeletons or artists’ impressions of the birds show them standing upright, it is likely that they actually moved along with their head out in front, just like a kiwi does. Despite almost always being portrayed as giants, some species of Moa were actually significantly smaller, much shorter than the height of a person, and some possibly as small as chickens!

Of course, completely lacking wings the question has been asked “how did the moa get to the islands of New Zealand”. It’s thought most likely that moa were already roaming New Zealand prior to it breaking away from the super-continent of Gondwana about 80 million year ago.

Many moa bones, eggs (including over 30 whole eggs), feathers, dehydrated skin and nesting materials have been found from a number of caves and other locations around New Zealand, in particular from the dry Central Otago region.

A Haast’s eagle divebombing a pair of moas. A new study finds that it only took a few thousand people to kill off the nine species of moas found on New Zealand, an act which also led to the extinction of their only predator, the Haast’s eagle. Image by: John Megahan/Creative Commons 2.5.

Species from top to bottom: South Island Giant Moa (Dinornis Robustus), Eastern Moa (Emeus Crassus), & The Little Bush Moa (Anomalopteryx Didiformis).

All three along with 6 other Moa species were driven to extinction by hunting and habitat destruction about 600 years ago.

Art Credit: Gabriel Ugueto

Extinction is a natural process that has been occurring for as long as there’s been life on earth. 99% of all organisms that have ever existed have gone extinct.
However, ongoing animal extinction is no longer a natural occurrence. It’s now a significant problem. This is because the current rate of extinction is higher than ever, and it’s changing the world as we know it. We’re losing many species every year, and many more are on the verge of extinction. If we don’t do something, there will be irreversible damage to ecosystems.
So what causes extinction, and what can we do to slow it down? Let’s discuss.

Extinction is a natural process that has been occurring for as long as there’s been life on earth. 99% of all organisms that have ever existed have gone extinct.
However, ongoing animal extinction is no longer a natural occurrence. It’s now a significant problem. This is because the current rate of extinction is higher than ever, and it’s changing the world as we know it. We’re losing many species every year, and many more are on the verge of extinction. If we don’t do something, there will be irreversible damage to ecosystems.
So what causes extinction, and what can we do to slow it down? Let’s discuss.

Extinction is a natural process that has been occurring for as long as there’s been life on earth. 99% of all organisms that have ever existed have gone extinct.
However, ongoing animal extinction is no longer a natural occurrence. It’s now a significant problem. This is because the current rate of extinction is higher than ever, and it’s changing the world as we know it. We’re losing many species every year, and many more are on the verge of extinction. If we don’t do something, there will be irreversible damage to ecosystems.
So what causes extinction, and what can we do to slow it down? Let’s discuss.

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