This crow-sized dinosaur may have struggled to fly because of its ‘fluffy’ feathers
Researchers believe the Anchiornis were not as good at regulating temperature and repelling water as modern birds.
![](https://www.expressandstar.com/resizer/v2/https%3A%2F%2Fcontentstore.nationalworld.com%2Fimages%2F3cf6d0b2-f1de-444c-8835-1ea69e7a4262.jpg?auth=bfde1f06bb6b77dded8d951504ea8859f587bfc3bf0c0643784d25ca28d3315f&width=300)
A “fluffy” dinosaur covered in primitive feathers may have been hampered in its early attempts at flight, research suggests.
The crow-sized dinosaur Anchiornis had feathers that fluffed up rather than lying flat like those of modern birds, a new study has shown.
They would probably have caused drag when the creature tried to glide between trees, say scientists.
![Fossil feather comparison.](http://content.assets.pressassociation.io/2017/11/29092205/748f7162-afbb-45fe-a793-fbeb13b2ac8a.jpg)
Anchiornis had four “wings” consisting of feather-covered arms and legs that may have helped it to glide before the evolution of powered flight.
The scientists built up what they claimed to be a highly accurate picture of the dinosaur after closely examining its fossils.
![Anchiornis dinosaur research](http://image.assets.pressassociation.io/v2/image/production/32a1c7981e326319263f9a8706a2f56cY29udGVudHNlYXJjaCwxNTEyMDMzODY3/2.33926209.jpg?w=640)
The scientists investigated feather structure in several dinosaur specimens from museums in China and Germany.
The findings are reported in the journal Paleontology.