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Tag: "birds" at biology news

Global map shows new patterns of extinction risk

The most detailed world map of mammals, birds and amphibians ever produced shows that endangered.... By looking at the numbers of endangered mammals, birds and amphibians in these squares, we have been able to see how this real picture varies from assumpti...

Cities change the songs of birds

...gbirds thrive, and the specific attributes of city birds that allow them to adjust to noisy urban environme...other coauthor, had shown that songs of individual birds were adjusted to local traffic noise conditions. The researchers had shown that great tit males in t...

New bird discovered on unexplored Columbian mountain

...s description is noteworthy in that one of the two birds caught by the team and used in the description as a type specimen was released unharmed, a DNA sample and photographs having been taken. This is the first time that a live specimen has been used for the description of a new bird following the approva...

'Empty nester' parent birds use recruitment calls to extend offspring care

...ve discovered a surprising new way in which parent birds can extend the period of their care of offspring. ... published by Cell Press. It is well known that birds feed their young directly, but it is usually assumed that care ends when the young leave the nest an...

Hopkins researchers discover how brain protein might control memory

...ory-linked behaviors ranging from song learning in birds to rodents being aware of 3-D space. In people, Arc may be one culprit behind certain long-term memory-based behaviors like drug addiction, the researchers say. "We think Arc controls how brain cells learn and associate behaviors and remember the...

Seals protect brain, conserve oxygen by turning off shivering response on icy dives

...e. The study "Neuronal hypoxic tolerance in diving birds and mammals," examines how diving birds and seals preserve brain cell function in the face of oxygen deficits. The study is by Folkow, Stian...

Climate change creates dramatic decline in red-winged black bird population

...d, an ecologist who specializes in the behavior of birds and snakes, says that although some people may be ...ch year, it lasted longer," said Weatherhead. "The birds appear to be interpreting the longer season as the end of the season lasting longer, when more femal...

Scientists find mutations that let bird flu adapt to humans

By comparing influenza viruses found in birds with those of the avian virus that have also infec...es required to transform a virus that only infects birds to a virus capable of easily recognizing human receptors. Receptors are molecules on the surface of ...

U of S Vaccine and Infectious Disease Organization team discovers key step in flu virus replication

...eins of the influenza viruses of swine, horses and birds to see how they activate downstream cellular signalling pathways. To do this, they are using reverse genetics technology, where researchers begin with a gene and figure out its function. These studies will allow the team to identify the genes that...

Tiny bones rewrite textbooks

... found there, and that New Zealand belonged to the birds only in more recent times," says Mr Worthy. "It ... many other species of animals, including fish and birds - also promises to shed new light on climate change in the Australasian region, recording a massive ...

Too mellow for our predatory world

...nsular animals. Over a longer evolutionary period, birds for example can lose their ability to fly. This would greatly reduce their ability to escape should new predators appear. In contrast to such "hard wired" traits, however, behavioural patterns should be significantly more flexible. In programmes intr...

Dinosaurs -- stones did not help with digestion

...eeth, and food is hard to digest? Some herbivorous birds which have a toothless beak, such as ostriches, so...grams. This may seem a bit daring. However, within birds the range of body weight and corresponding masses of gastric stones also spans four orders of magni...

Singing for survival

...sponse to predators ?mostly large cats, snakes and birds of prey ?have been previously noted, but no extensive research into its purpose or understanding by other gibbons has been done until now. The team, Esther Clarke, Klaus Zuberbuhler (both St Andrews) and Ulrich Reichard (Max Planck Institute, Ger...

Ancient birds flew on all-fours

The earliest known ancestor of modern-day birds took to the skies by gliding from trees using prim...PhD student Nick Longrich challenges the idea that birds began flying by taking off from the ground while running and shows that the dinosaur-like bird Archa...

Disappearing nest egg: Researcher studying declining numbers of macaws

One of the most colorful birds in the world may have a less-than-colorful future.... several reasons for their declining numbers. The birds are highly prized by the pet trade industry, and they are losing their native habitat due to constru...

Steep oxygen decline halted first land colonization by Earth's sea creatures

...system used by birds. They found that at sea level birds breathe 30 percent more efficiently than mammals and at 5,000 feet in elevation birds are 200 percent more efficient. Ward pictures a world in which dinosaurs were able to adapt to lo...

Fragmentation rapidly erodes Amazonian biodiversity

...e dark forest understory that need animals such as birds or bats to disperse their seeds and pollen.? Fragmentation is also changing the dynamics and structure of the forest. Tree communities in fragments are highly unstable, losing and gaining species at a high rate. Fragments also tend to lose many o...

Save the whales? Sure, but how many?

...watersheds, or predators reducing pest species, or birds dispersing seeds. 'Sustainable human use' represents the next tier, where there are enough animals that they can be used by humans, consumptively (as in hunting or fishing) or non-consumptively (as in tourism.) Most models for sustainable use only...

Mother birds give a nutritional leg up to chicks with unattractive fathers

Mother birds deposit variable amounts of antioxidants into egg ...gical and Biochemical Zoology shows that even ugly birds get their day. Providing new insight into the strategic basis behind resource allocation in eggs, th...

What animals can tell us about hemorrhage, organ transplants and aging

... significant muscle atrophy They follow migrating birds thousands of miles to understand how they fuel the...help explain the longer-than-expected life span of birds and bats, Kristan said. These are just two of the symposia taking place at the conference. There...

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