March 20, 2019

Coloured bird, dinosaur eggs in same evolutionary basket

02 November 2018, 11:15 | Edward Lowe

Assortment of paleognath and neognath bird eggs and a fossil theropod egg

Assortment of paleognath and neognath bird eggs and a fossil theropod egg

Wiesmann, who hopes her study can be used for future research, offered an explanation for how egg colors may have adapted.

Assortment of paleognath and neognath bird eggs and a fossil theropod egg (on the right). The color, size, and pattern of a bird's eggs is often unique to its species, and there's online tools and even entire books dedicated to classifying bird eggs so that bird watchers can easily identify them. "Like feathers and wishbones, we now know that egg color evolved in their dinosaur predecessors long before birds appeared", said Mark Norell, the Macaulay Curator of Paleontology at the American Museum of Natural History and co-author of the study.

In fact, lay eggs many animals, but different in color only happens in birds. "Our study fundamentally changes our understanding of egg colour evolution, and adds colour to dinosaur nests in the real "Jurassic World".

For an instance, the predator named Deinonychus had a blue egg with brown blotches and the bird-like Oviraptor, famous for its toothless beak, had eggs that were dark blue in colour.

Barbra Streisand Scares The Crap Out Of James Corden On 'Carpool Karaoke'
In a twist on the usual format, Streisand picked up Corden in her vehicle and it was she who drove through the whole segment. But she failed a written test three times before she was able to take the wheel. "This is a huge mistake".

If you're interested in all the practical advantages of speckled and brightly colored eggs, check out this article.

"We infer that egg color co-evolved with open nesting habits in dinosaurs", Wiemann said. Two, some parent birds use spot patterns to recognize their own eggs if they live in large colonies (or to prevent freeloading birds, like cuckoos, from sneaking their eggs into a brood).

The rainbow of hues seen in modern bird eggs probably evolved in birds' dinosaur ancestors, which had eggs with colorful and speckled shells.

But really though: A study from a year ago found that oviraptors, a dinosaur of the late Cretaceous period, laid blue-green eggs, containing the same pigments as modern bird eggs. And last year, molecular paleobiologist Jasmina Wiemann of Yale University published the first evidence of dinosaur egg coloration, using chemical analysis to detect two pigments-blue-green biliverdin and red-brown protoporphyrin-in the eggs of a 70-million-year-old parrot-beaked oviraptorosaur called Heyuannia from China.

Usain Bolt quits Central Coast Mariners over contract dispute
Mariners CEO Shaun Mielekamp says it was great to see Usain Bolt's growth during his trial with Central Coast. The 100m and 200m world record holder has described it as his "dream" to play professional football.

"Birds were not the first [egg-layers] to produce coloured eggs", the researchers write. "For two centuries, ornithologists assumed that egg color appeared in modern birds' eggs multiple times, independently". Crocodiles and turtles bury their white eggs, which means they don't need to be camouflaged.

Most likely, it was a single event, even of uncertain mutation, which caused accumulation of biliverdin in the shell and made the eggs for the beginning of blue-green.

"The egg colors of birds reflect characteristic preferences in nesting environments and brooding behaviors", Yale explained. The biliverdin was able to find in the remains of eggs of seven different dinosaurs. But many birds have colored eggshells that camouflage their eggs in nests that are exposed to the elements and predators. Given the analytical methods from other scientific disciplines now available for work on fossils, "It's an incredible time to be a paleontologist", she says.

Euro zone inflation rises as expected, core measure up more
Confidence in industry and services also went down, while consumer sentiment improved slightly. The annual inflation rate in the euro area in October is the highest since December 2012 .

Other News

Trending Now

AA expects petrol price drop, diesel price rise for November
The AA said the modest decline in worldwide petroleum prices in the past month is "a cause for optimism". This is a welcome respite for consumers hit hard by seven successive months of rising fuel prices.

Denmark Mulling Sanctions after Iran Plot
Just a year ago , the Danish Export Credit Agency made a deal with eight Iranian banks, giving them lines of credit or guarantees. After President Donald Trump pulled the United States out of the Iran nuclear deal, the European Union continued to honor it.

Seven Killed in Attack on Coptic Christians Bus in Egypt
In December 2017, an ISIS gunman killed nine people in an attack on a church in a south Cairo suburb. Coptic Christians have been repeatedly targeted by terrorists.

Starbucks leans into Christmas and unveils four new holiday cups
When it comes to drink, it's more of the classics you're used to as the weather gets cold and the days get short. But then you'd have to buy... doing the math... five holiday Starbucks drinks this season to recoup the cost.

Martin Lawrence and Will Smith Confirm New 'Bad Boys' Film
Production is set to begin on the movie in early 2019, with the film having been handed a tentative release date of January 2020. The film has been on and off again for a number of years in part due to Will Smith's extremely busy schedule.

Ridley Scott Working On A Gladiator Sequel
The Gladiator sequel is in early stages of development, with Paramount now in negotiations to land the project. Apparently he tried to get his friend Nick Cave (yes, of The Bad Seeds ) to write the script for a sequel.

Free flu shot drive-thru clinics planned in Douglas County
The flu vaccine doesn't prevent against all flu-causing viruses, but it is formulated to protect against the most common ones. Catching the flu is not only uncomfortable; it can be unsafe , especially if you already have a weakened immune system.

Ariana Grande To Perform In Pittsburgh On World Tour
So far, the 25-year-old has only announced dates in the U.S. - but she's expected to add European dates soon. Rapper Mac Miller , Grande's longtime boyfriend, died in September of an apparent drug overdose.

Saudi Arabia executes Indonesian maid who killed man she says assaulted her
She said she was acting in self-defense and that he had been sexually abusing her. She was found guilty of murdering her employer's father.

United States charges Chinese companies with stealing trade secrets
The Trump administration has imposed $250 billion in tariffs on Chinese products, triggering retaliatory measures from Beijing. Donald Trump has slapped tariffs on $250bn in Chinese products in an effort to narrow the U.S. trade deficit with China.