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Latest Tetrachromacy Stories

2013-03-05 14:06:21

New research has shown that certain Australian native flowers have shifted away from using insects as pollinators and evolved their flower color to the red hues favored by birds. In a study published in New Phytologist, biologists from Monash University and RMIT University have shown for the first time that Australian native flowers exclusively pollinated by birds have evolved color spectral signatures that are best discriminated by those birds. Dr Adrian Dyer of Monash and RMIT said...

Scientist Recommends Research Method Change For Evolutionary Biology
2013-02-16 08:11:00

April Flowers for redOrbit.com — Your Universe Online Shozo Yokoyama, a biologist at Emory University, says evolutionary biologists need to shift their focus from present-day molecules to synthesized, ancestral ones to truly understand the mechanisms of natural selection. Yokoyama presented evidence to support his claim at the American Academy of Arts and Sciences (AAAS) meeting in Boston this week. "This is not just an evolutionary biology problem, it's a science problem,"...

2013-02-11 10:54:37

Ultraviolet vision evolved at least eight times in birds from a common violet sensitive ancestor finds a study published in BioMed Central's open access journal BMC Evolutionary Biology. All of these are due to single nucleotide changes in the DNA. Modern daytime birds either have violet sensitive or ultraviolet sensitive vision. Being ultraviolet sensitive alters visual cues used to select a mate, avoiding predators, and in finding food. Researchers from Uppsala University and the Swedish...

2011-06-23 15:24:24

Research reveals plumages exhibit less than a third of possible colors birds can see Contrary to our human perception of bird coloration as extraordinarily diverse, a new study reports that bird plumages exhibit only a small fraction (less than a third) of the possible colors birds can observe. Early lineages of living birds probably produced an even smaller range of colors, but the evolution of innovative pigments and structural (or optical) colors has allowed many birds to create more...

2009-10-17 09:56:28

Emory University researchers have identified the first fish known to have switched from ultraviolet vision to violet vision, or the ability to see blue light. The discovery is also the first example of an animal deleting a molecule to change its visual spectrum. Their findings on scabbardfish, linking molecular evolution to functional changes and the possible environmental factors driving them, were published Oct. 13 in the Proceedings of the National Academy of Sciences. "This...

2009-05-14 04:11:00

BEND, Ore., May 14 /PRNewswire/ -- WindowAlert announced today that it has sent technologically advanced window decals to 1600 Pennsylvania Avenue in Washington DC. The decals help prevent wild birds from striking windows. It is hoped that Michelle Obama and her children will set an example for the country by installing the decals on White House windows. WindowAlert is an environmental firm specializing in UV-reflective technology. The company manufactures window decals that...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'