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Tag: "birds" at biology news

Trotting with emus to walk with dinosaurs

... to help decipher the tracks. Large flightless birds are the most logical choice and are, along with all birds today, thought to be descended from dinosaurs. But not all of those alive today are good choices or ...

Protowings may have helped bird ancestors cover rough terrain

Biologists have long argued about how birds evolved the ability to fly, because it is not imme...lp them glide, while the other considers ancestral birds to be terrestrial dinosaurs that developed powered flight from the ground up. An article by Kenneth...

Ohio University researchers discover evolutionary oddity in flamingos

...stigating the evolution of jaw muscles in lizards, birds and dinosaurs. By sheer luck we discovered something new about flamingos." To get a detailed look at the flamingo's jaw muscle structure, the researchers injected a colored barium/latex mixture into the blood vessels of a bird that had died and w...

Air travel and pandemic flu

...nt the virus responsible does not pass easily from birds to humans, and it does not seem to pass from one human to another. However, the fear is that the virus might change and that human-to-human infection could then be possible. Should all this happen, the changed virus would be a major threat to human h...

Control measures fail to stop spread of new H5N1 virus

...eover, the increasing number of transmissions from birds to humans in the past year supports this opinion, said Robert G. Webster, Ph.D., a co-author of the PNAS paper. Webster is a member of the Infectious Diseases department and holder of the Rose Marie Thomas Chair at St. Jude. Based on their study o...

New strategy developed to combat West Nile Virus

...ed by a complex interaction of mosquitoes, nesting birds and specific weather patterns, scientists say, whi... mosquitoes feed almost exclusively on the nesting birds and as a result, each bird is bitten by numerous mosquitoes. A single infected bird can thus infect ...

Zebra finch males prefer females with exaggerated maternal traits

...ing about the appearance of their parents may give birds a preference for mates with exaggerated parental t...rences between sexes ?phenomena seen frequently in birds and other animals. The findings are reported by Carel ten Cate, Machteld Verzijden and Eric Etman of...

Race to halt global amphibian crisis boosted by rediscovery of endangered Colombian frogs

...ll prevent the extinction of threatened species of birds and frogs found nowhere else on the planet." El D...stopover point for declining neotropical migratory birds that breed in the United States and Canada, such as the Cerulean and Golden-winged Warblers. Fundac...

Copying nature could save us energy, study shows

...nergy in the same way. Instead, insects, plants, birds and mammals rely on the structure and organisation of their body parts and behaviour; the solutions to problems are already built in. "An example might be a hammer," said Professor Julian Vincent from the University of Bath who led the research . "...

Female birds boost up their eggs when hearing sexy song

...hology in Seewiesen and Radolfzell in Germany. The birds were kept in large aviaries where their daily behaviour was monitored in a colony before they were tested in the song experiments. The females showed a remarkable consistency in their behavioural and reproductive performance and the song stimuli alon...

Origen publishes in Nature a robust and versatile method for creating transgenic chickens

...hat work well in model systems and breed flocks of birds depositing therapeutic proteins in their eggs. The use of primordial germ cells, the ease of producing small or large flocks of chickens, and the existing infrastructure for rearing chickens and processing eggs means that therapeutic proteins can now...

Recent, rapid climate change is driving evolution of animal species

...enetic changes in animals as diverse as squirrels, birds and mosquitoes, according to University of Oregon evolutionary geneticists. Writing in the "Perspectives" section of the June 9 issue of SCIENCE, William E. Bradshaw, professor of biology, and Christina Holzapfel, biology research associate, show th...

Biological motors sort molecules one by one on a chip

...h to the nano-channels, the researchers killed two birds with one stone. In addition to the possibility of steering individual microtubules, they were able to prevent the microtubules from derailing from their tracks. Incidentally, the Delft researchers discovered that their work contained a third interest...

Dragonfly migration resembles that of birds, scientists say

...light patterns showed manysimilarities to those of birds that migrate over the same regions ofcoastal New J...volutionary biology. "Additionally, groups of both birds and dragonflies did not migrate on very windy days and only moved after two successivenights of fall...

Researcher gives hard thoughts on soft inheritance

...ution. Lamarck, for instance, believed that shore birds acquired their long legs by constantly stretching ...ations later that kind of environment gave rise to birds with long legs. Neo-Lamarckian views of evolutionary change stress the importance of the environmen...

Large dinosaurs were extremely hot in their day, UF study finds

...more constant body temperatures similar to today's birds and mammals. The researchers show that this increase in body temperature with size has been observed in modern crocodiles. "The study is an important contribution to the scientific discussion about dinosaurs, because it is the first that uses evide...

Bird brains shrink from exposure to contaminants

... part of their diet. They specifically chose these birds in the Okanagan Valley because at that location they are exposed to high levels of DDT, but relatively low levels of other chemicals. The researchers captured 18 nestlings and then hand-reared and observed them for two years. They then sectioned th...

Light guides flight of migratory birds

... resolve the fundamental question of how migratory birds integrate multiple sources of directional informat...headed south. She was able to demonstrate that the birds calibrate their magnetic compass based on polarized light patterns at sunset and sunrise. The rese...

Even a little cooling helps after cardiac arrest

...ts to complete their lifecycle. Snails to crabs to birds might be a typical sequence for one species, snails to fish to birds for another. These trematodes also stand apart from other parasites in that they cause negligible di...

How healthy is that marsh? Biologists count parasites

...ts to complete their lifecycle. Snails to crabs to birds might be a typical sequence for one species, snails to fish to birds for another. These trematodes also stand apart from other parasites in that they cause negligible di...

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