Dinosaurs used feathers for sex, not flying

A set of 75 million class - old fossils find in the badlands of southern Alberta is adding credence to the suggestion that dinosaur used feather to pull in a mate , and not to take flight . The fossils , which are from the oldest feathered dinosaurs ever set up , are also offer further proof that all ornithomimids — an ostrich like creature — were covered in plumage .

The image to your rightfield is an aesthetic reconstructive memory of feather ornithomimid dinosaurs by Julius Csotonyi .

agree to researcher Darla Zelenitsky from the University of Calgary , the Upper Cretaceous Ornithomimus underwent a unique pattern of modification in its feathery feather over the course of its life . Prior to becoming an adult , the dinosaur would have been covered in down - same plume . But as it got old , it prepare larger feathers on the forearms which formed wing - like structure . This pattern , says Zelenitsky , is dissimilar from what we see in bird who germinate fledge wings when they ’re still quite young .

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The discovery also indicates that these dinosaurs did not apply these filiform plume for any kind of flight or glide . Because the wing - comparable forelimbs formulate only in more mature soul , palaeontologist theorize that they were used later in spirit for such thing as pull a mate or orchis pensiveness . Moreover , because ornithomimid were over 150 kg ( 330 lbs ) , there would have been simply too full-grown to vanish .

And interestingly , these specimen , which were establish back in 2008 and 2009 , have labor back the date of the other wings by about 10 million year . But because they were n’t used for flying , paleontologists think they must have evolved for all different reasons — and only later did they endow smaller , lighter versions of dinosaurs with flight .

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