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Fossils of First Feathered Dinosaurs from North America Discovered: Clues On Early Wing Uses
ScienceDaily (Oct. 25, 2012) — The ostrich-like dinosaurs in the spring Jurassic Park movie were portrayed in the manner that a herd of scaly, fleet-footed animals inmost nature chased by a ferocious Tyrannosaurus rex. New investigation published in the journal Science reveals this depiction of these fowl of the air-mimic dinosaurs is not entirely close -- the ornithomimids, as they are scientifically known, should acquire had feathers and wings. The of the present day study, led by paleontologists Darla Zelenitsky from the University of Calgary and Francois Therrien from the Royal Tyrrell Museum of Palaeontology, describes the primeval ornithomimid specimens preserved with feathers, recovered from 75 the multitude-year-old rocks in the badlands of Alberta, Canada.
"This is a indeed exciting discovery as it represents the principal feathered dinosaur specimens found in the Western Hemisphere," says Zelenitsky, ally professor at the University of Calgary and prevail on author of the study. "Furthermore, notwithstanding the many ornithomimid skeletons known, these specimens are besides the first to reveal that ornithomimids were covered in feathers, like several other groups of theropod dinosaurs."
The researchers fix evidence of feathers preserved with a childish and two adults skeletons of Ornithomimus, a dinosaur that belongs to the form into ~s known as ornithomimids. This discovery suggests that quite ornithomimid dinosaurs would have had feathers.
The specimens reveal an interesting original of change in feathery plumage during the life of Ornithomimus. "This dinosaur was covered in down-like feathers throughout life, but barely older individuals developed larger feathers forward the arms, forming wing-like structures," says Zelenitsky. "This figure differs from that seen in birds, whither the wings generally develop very young, presently after hatching."
This discovery of seasonably wings in dinosaurs too big to slip indicates the initial use of these structures...

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