Very recently, scientists have been able to detect pigment - containing granules, called melanosomes, in some very
early bird fossils, as well as in their immediate ancestors, the dinosaurs.
A new analysis of
early bird fossils adds weight to the idea that they once had four wings.
Not exact matches
Also, «For one thing,
birds are found
earlier in the
fossil record than the dinosaurs they are supposed to have descended from,» Ruben said.
He adds that other recent finds suggest that water
birds such as penguins did the same thing:
Earlier this year, researchers reported finding a 61 - million - year - old
fossil of a 1.5 - meter - tall penguin in what is today New Zealand.
The tiny
fossil, just a few centimeters long, is giving paleontologists a rare window into the
early development of a group of extinct
birds called Enantiornithes, researchers report March 5 in Nature Communications.
Over the last two decades, huge numbers of
fossils have been collected from the western Liaoning Province and adjacent parts of northeastern China, including exceptionally preserved feathered dinosaurs,
early birds, and mammals.
The Fouldenia
fossils came from a site in Scotland that also produced the
earliest - known post-extinction tetrapods, four - limbed creatures that later crawled ashore and evolved into amphibians, reptiles,
birds and mammals.
«
Fossils such as this are allowing scientists to dissect the most intricate aspects of the
early evolution of the flight of
birds.»
«The anatomical match between the muscle network preserved in the
fossil and those that characterize the wings of living
birds strongly indicates that some of the
earliest birds were capable of aerodynamic prowess like many present - day
birds,» said Chiappe, the investigation's senior scientist.
A fully feathered
fossil of the dinosaur - like
bird Archaeopteryx is ruffling scientists» understanding of what drove
early feather evolution, scientists report July 2 in Nature.
The team compared the
fossil's feather layout to the distribution of feathers on other
fossils, including both dinosaurs and
early birds, and found a surprising amount of variation between species.
Both mammals and
birds have FLB, and Shelton and his colleague investigated its presence in an
early fossil relative of mammals, Ophiacodon.
A tiny barbet - like
bird from the Lower Oligocene of Germany: The smallest species and
earliest substantial
fossil record of the Pici (woodpeckers and allies)
Wang invented a novel statistical method that was able to take advantage of new kinds of data from the
fossil record, which reached the conclusion that
early birds had a high rate of evolution.
Because of their fragility and size,
bird bones have been rare or absent at most other eastern African
fossil assemblages that included
early hominids.
Nevertheless, it is still
early days for this research: Although the researchers were able to determine, by the concentration of copper and other elements, that the feathers of
fossil birds such as Confuciusornis had darker and lighter areas, they are not yet able to tell what colors these represent.
Good specimens of
fossil birds are thin on the ground, especially
early ones.
The addition of the
fossil to existing data on ancient turtles solidifies the theory that changes to the ribs and vertebrae were
early steps in shell evolution and occurred during the Permian geological period, when
early mammal,
bird, and crocodile relatives were also diversifying.
Although they had found some excellent specimens of the
earliest birds, such as Germany's famed 150 - million - year - old Archaeopteryx, as well as stunning later
fossils from northeastern China, a 20 - million - year gap remained between Archaeopteryx and other
fossils, most of which were opposite
birds, Chiappe says.
The
fossils» specialized anatomy suggests that key factors in
birds» long - term success, such as expert flying ability and rapid growth rates, arose surprisingly
early in avian evolution.
«The new
fossils superbly document the link between modern whales and their land - based forebears,» he concludes, «and should take their place among other famous «intermediates,» such as the most primitive
bird, Archaeopteryx, and the
early hominid Australopithecus.
The nearly complete skeleton, unearthed from 160 - million - year - old mudstone deposits in northwestern China's Junggar Basin, extends the
fossil record of alvarezsauroids back in time by a whopping 63 million years — making it about 15 million years older than the
earliest known
bird, Archaeopteryx.
Then there are the almost countless fish, some with the tail of a smaller fish grotesquely hanging out of their mouths.These
fossils offer more than beauty: they preserve in wonderful detail
early forms of modern
birds and mammals, including the first bats in the
fossil record, making them vital windows into evolution.
There are also
fossils of
early birds themselves.
Earlier finds from Liaoning had hinted at the presence of featherlike structures on several dinosaur specimens, but critics charged that the structures were instead fibers of the protein collagen or that the
fossils represented not dinosaurs but flightless
birds.
Publication Mayr G, Wilde V. 2014 Eocene
fossil is
earliest evidence of flower - visiting by
birds.
The new
fossils, combined with those of other
early avians reveal that the
earliest birds were widespread throughout Europe and Asia by the end of the Jurassic.
The
fossil record indicates
birds evolved from theropod dinosaurs 200 to 150 million years ago, and the
earliest known
bird is the late Jurassic Archaeopteryx.
Magical mountain scenery,
Early Stone Age artefacts, cultural - historic structures and ruins, interesting geological formations, wildlife,
bird life, lichens, marine trace
fossils, three Matjiesfontein Fynbos vegetation types and clear night skies create a unique sense of place and ensure that there is something to interest all nature lovers.
The diverse collections also boast artifacts of ancient history and natural science:
fossil collections, a 143 - pound meteorite, an Egyptian mummy, shards of Babylonian cuneiform tablets, samplings of
early Mediterranean jewelry, and representations of Berkshire ecosystems including local mammals,
birds, reptiles, fish, insects, plants, and minerals.