Many shorebirds, ducks, ostriches, pheasants, quail or falcons build their nests with this technique, which involves scraping the ground with their feet to make a small hole.
A team of paleontologists argued that dinosaurs and birds kept courtship before mating.
The international team of researchers, led by paleontologist Martin Lockley, an expert on dinosaur footprints and teacher University of Colorado at Denver (USA), discovered large scratches on sandstone 100 million years ago in western Colorado. These ancient scrapes are similar to those which causes a curious behavior among birds today, the males show their skills digging a sort of nest to potential partners, a dance that leaves marks on the floor characteristics. Many shorebirds, ducks, ostriches, pheasants, quail or falcons build their nests with this technique, which involves scraping the ground with their feet to make a small hole.
“These are the first sites in that evidence of mating rituals of the dinosaurs, and the first physical evidence of courtship behavior are, “said Lockley.
The paleontologist found the remains of more than 50 scuffing of dinosaurs, some as large as bathtubs, in giant slabs located in areas where they also have confirmed traces of carnivorous and herbivorous dinosaurs near Delta, Colorado, and Dinosaur Ridge, west of Denver.
To Lockley, this evidence supports the theories of sexual selection as an evolutionary drive. Similar sexual selection is common in mammals and birds
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