Sentences with phrase «with flight feathers»
And we can only speculate on the diversity of flight ability among extinct avian dinosaurs such as the enantiornithines and the enigmatic, four - winged microraptors, with flight feathers not only on their forelimbs but also on their legs.
https://www.scientificamerican.com/ Not exact matches
Along with other research, this absolutely established that feathers evolved in dinosaurs prior to the origin of flight and prior to the origin of birds.
The important implication of this theory is that feathers did not initially evolve for flight because you can't fly with down.
When the team bombarded the fossils with charged particles and then analyzed the particles that were knocked from the surface (a technique called time - of - flight secondary ion mass spectrometry), they chemically identified the remnants of eumelanin, a pigment that typically lends a black or brown color to skin or feathers.
But with the discovery in recent years of many earlier feathered dinosaurs with anatomies tailored for flight, the idea is being seriously considered.
And they may also, along with a newly re-examined specimen found in 1995, provide insight into what role feathers played for animals that did not use them for flight.
«Up until now, the evolution of feathers was mainly considered to be an adaptation related to flight or to warm - bloodedness, seasoned with a few speculations about display capabilities» says the article's first author, Marie - Claire Koschowitz of the Steinmann Institute for Geology, Mineralogy and Paleontology at the University of Bonn.
With a continuous surface, he says it could generate more lift than the feathers along the tail of the most primitive bird, Archaeopteryx, making it more useful for flight.
But the discovery of a 36 - million - year - old giant penguin skeleton in Peru, with many of its feathers preserved, is providing new clues to this bird's evolutionary flight path from air to sea.
Scientists from the University of Southampton have revealed that feather shafts are made of a multi-layered fibrous composite material, much like carbon fibre, which allows the feather to bend and twist to cope with the stresses of flight.
Sawyer and Greenwold made the case in an earlier paper that the expansion and elaboration of the feather beta - keratin gene coincides with the evolution of the feather itself, from a simple body covering to a sophisticated assembly of interconnected working parts that make powered flight, among other competitive advantages, possible.
Christian, who led the study as part of his research degree (MRes) in Vertebrate Palaeontology, adds: «Our results indicate that the number, and the relative thickness, of layers around the circumference of the rachis and along the feather's length are not fixed, and may vary either in order to cope with the stresses of flight particular to the bird or to the lineage that the individual belongs to.»
For example, the researchers showed that a gene known as Sim1, which contains an ASHCE, may be associated with the evolution of flight feathers.
The development of feathers also mirrored the development of other features associated with flight, with shorter - armed dinosaurs having short, fuzzy feathers, and full flight feathers appearing on the longer arms of Archaeopteryx and Microraptor.
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Our In Flight Feather Stencil and Otomi Folk Art Furniture Stencil painted with metallic gold really pop on these dressers and accent wall, don't they?
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Contrast «Go Fly a Kite» with poems about bird flight found in Jane Yolen's Birds of a Feather or Michael J. Rosen's The Cuckoo's Haiku: And Other Birding Poems.
More flight feathers, approximately seven to nine, need to be trimmed on birds with long, pointed wings, while six to seven is enough on those with rounded ones.
Also known as the «Queen of Bavaria Conure», the eye - catching Golden Conure has bright yellow feathers all over its body with the exception of the very tips of its flight feathers, which offer contrast in a lovely dark green.
Clipping the wings is a painless process and, in fact, a temporary one because the flight feathers will grow back with each successive molt.
Another disadvantage is that many birds with only 1 wing trimmed can fly as soon as 1 - 2 flight feathers have grown out on the trimmed side.
As their name implies, plumage is predominantly red, with accents of blue and bright gold on their flight and tail feathers.
Did she smear herself with white feathers — tarred and feathered, but still about to take flight?
Owls have evolved highly specialized feathers with fringes of varied softness that muffle the sounds of flight when closing in on their prey.
Our In Flight Feather Stencil and Otomi Folk Art Furniture Stencil painted with metallic gold really pop on these dressers and accent wall, don't they?