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Peacock Inherited Show-off Trait From Dinosaur Ancestors, New Study Suggests

A peacock takes a sunbath on a cold Wednesday, Feb. 21, 2018 at the zoo in Dortmund, Germany. (AP Photo/Martin Meissner)
A peacock takes a sunbath on a cold Wednesday, Feb. 21, 2018 at the zoo in Dortmund, Germany. (AP Photo/Martin Meissner)
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Peacock Inherited Show-off Trait From Dinosaur Ancestors, New Study Suggests

A peacock takes a sunbath on a cold Wednesday, Feb. 21, 2018 at the zoo in Dortmund, Germany. (AP Photo/Martin Meissner)
A peacock takes a sunbath on a cold Wednesday, Feb. 21, 2018 at the zoo in Dortmund, Germany. (AP Photo/Martin Meissner)

A new dinosaur fossil revealed that the show-off tendency in some birds, mostly peacocks, dates back to millions of years.

The new species, Ubirajara jubatus (the Latin meaning of the Lord of the Spear), was chicken-sized with a mane of long fur down its back and stiff ribbons projecting out and back from its shoulders, features never before seen in the fossil record. It is thought its flamboyant features were used to dazzle mates or intimidate foes.

An international team of scientists from the University of Portsmouth, and the State Museum of Natural History, Karlsruhe, Germany discovered the new species while examining fossils in Karlsruhe´s collection. The study was published on December 14 in the journal Cretaceous Research.

"What is especially unusual about the beast is the presence of two very long, probably stiff ribbons on either side of its shoulders that were probably used for display, for mate attraction, inter-male rivalry or to frighten off foes," said the study's lead author David Martill in a report published on the website of the Portsmouth University.

The ribbons are not scales or fur, nor are they feathers in the modern sense. They appear to be structures unique to this animal, which makes one ask: Why adorn yourself in a way that makes you more obvious to both your prey and to potential predators? "The truth is that for many animals, evolutionary success is about more than just surviving, you also have to look good if you want to pass your genes on to the next generation," Martill explained.

Modern birds are famed for their elaborate plumage and displays that are used to attract mates -- the peacock's tail and male birds-of-paradise are textbook examples of this. Ubirajara shows us that this tendency to show off is not a uniquely avian characteristic, but something that birds inherited from their dinosaur ancestors, as indicated this unique fossil.

Ubirajara jubatus lived about 110 million years ago, during the Aptian stage of the Cretaceous period, and is closely related to the European Jurassic dinosaur. It is the first non-avian dinosaur to be described from Brazil's Crato Formation, a shallow inland sea laid down about 110 million years ago.

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Mexico Bans Junk Food Sales in Schools in Latest Salvo Against Child Obesity

A child snacks on cotton candy at Chapultepec park in Mexico City, Saturday, March 29, 2025. (AP Photo/Fernando Llano)
A child snacks on cotton candy at Chapultepec park in Mexico City, Saturday, March 29, 2025. (AP Photo/Fernando Llano)
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Mexico Bans Junk Food Sales in Schools in Latest Salvo Against Child Obesity

A child snacks on cotton candy at Chapultepec park in Mexico City, Saturday, March 29, 2025. (AP Photo/Fernando Llano)
A child snacks on cotton candy at Chapultepec park in Mexico City, Saturday, March 29, 2025. (AP Photo/Fernando Llano)

A government-sponsored junk food ban in schools across Mexico took effect on Saturday, officials said, as the country tries to tackle one of the world’s worst obesity and diabetes epidemics.
The health guidelines, first published last fall, take a direct shot at salty and sweet processed products that have become a staple for generations of Mexican schoolchildren, such as sugary fruit drinks, packaged chips, artificial pork rinds and soy-encased, chili-flavored peanuts, The Associated Press reported.
Announcing that the ban had become law, Mexico's Education Ministry posted on X: “Farewell, junk food!” It encouraged parents to support the government's crusade by cooking healthy meals for their kids.
“One of the core principles of the new Mexican school system is healthy living," said Mario Delgado, the public health secretary. “There's a high level of acceptance of this policy among parents.”
Mexico's ambitious attempt to remake its food culture and reprogram the next generation of consumers is being watched closely around the world as governments struggle to turn the tide on a global obesity epidemic.
In the United States, for instance, the Trump administration’s health secretary, Robert F. Kennedy Jr., has vowed to upend the nation's food system and “ Make America Healthy Again " by targeting ultra-processed foods to curb surging obesity and disease.
Under Mexico's new order, schools must phase out any food and beverage displaying even one black warning logo marking it as high in salt, sugar, calories and fat. Mexico implemented that compulsory front-of-package labeling system in 2020.
Enforced from Monday morning, the start of the school week, the junk food ban also requires schools to serve more nutritious alternatives to junk food, like bean tacos, and offer plain drinking water.
“It is much better to eat a bean taco than a bag of potato chips,” said Mexican President Claudia Sheinbaum, who has championed the ban.
Mexico’s children consume more junk food than anywhere else in Latin America, according to UNICEF, which classifies the nation’s childhood obesity epidemic as an emergency. Sugary drinks and highly processed foods account for 40% of the total calories that children consume in a day, the agency reports.
“At my daughter's school, they told us that future activities wouldn't have candy, it would be completely different, with fruit, vegetables and other food that's healthy for kids,” said Aurora Martínez, a mother of two. “It will help us a lot.”
One-third of Mexican children are already considered overweight or obese, according to government statistics.
School administrators found in violation of the order face stiff fines, ranging from $545 to $5,450.
But enforcement poses a challenge in a country where previous junk food bans have struggled to gain traction and monitoring has been lax across Mexico’s 255,000 schools, many of which lack water fountains — even reliable internet and electricity.
It also wasn't immediately clear how the government would forbid the sale of junk food on sidewalks outside school campuses, where street vendors typically hawk candy, chips, nachos and ice cream to kids during recess and after the school day ends.
“It will be difficult,” said Abril Geraldine Rose de León, a child therapist. “But it will be achieved in the long run.”