Eavesdropping nuthatches distinguish danger threats in chickadee alarm calls
...it other birds to harass, or mob, the predator and chase it away. Analysis of recorded chickadee mobbing calls indicated that the acoustic features of the calls varied with the size of the predator observed. Most typically chickadees change the dee-dee-dee note at the end of the calls, sometimes adding f...Selecting life: Scientists find new way to search for origin of life
...en. "In many ways, Hazen's approach cuts to the chase of addressing this problem," said Patricia Dove, professor of geochemistry at Virginia Tech. "By adapting the microarray approach from molecular biology, his research group can identify up to one million types of biomolecules very quickly to learn wh...Hormone might cause dangerous pregnancy complication
... overproduced in preeclampsia. The next step is to chase down the hormone. But in the meantime, we have a backup, because we know where the receptor is, and an alteration that changes the reaction between the hormone and the receptor will abolish this kind of hypertension." Preeclampsia typically starts a...Geneticists identify 'master switch' that causes female flies to behave like males
...the male's brain devoted to smell, he continues to chase females despite repeated rejections. Sex in a single gene Baker says that the work he and his colleagues have done over the past decade has made the fruitless system's regulation better understood than that of any other behavioral network. Taken as...Wolves alleviate impact of climate change on food supply, finds new UC Berkeley study
...en they are on a hunt," said Wilmers. "When wolves chase down their prey through wide open spaces over long distances, it's as good as a dinner bell. Ravens and other scavengers know that a meal is coming." The study adds a new twist to the wolves' ability to provide food for other animals. It highlights...In the mating game, male wild turkeys benefit even when they don't get the girl
...ontinue to display, like a back-up singer, or even chase away other males that got to close," Krakauer said. In order to establish which male actually copulated with the female - an activity hard to see in the brush - Krakauer captured, tagged and obtained blood samples from male and female turkeys, and th...Gorilla diet tips -- Have we 'evolved to eat mush'?
...consumption "was limited to game they were able to chase down and kill," whereas modern humans in the developed world "can stock up on nearly limitless amounts of protein." Renowned paleoanthropologist Bernard Wood of George Washington University, whose lifelong quest to understand our origins included wor...Hummingbirds lose power at high altitudes
...s reserve power for the bursts of flight needed to chase off competitors or escape from predators, said researchers from the University of California, Berkeley, and the California Institute of Technology. "The costs of hovering flight are the same across elevations because hummingbirds compensate by hav...Study in Royal Society journal on first evidence for magnetic field detection in sharks
...w plunge diving or surface diving that are used to chase for very mobile prey like flying fishes associated with sub surface predators such as tunas. To spot prey patches at distance birds climb regularly to altitudes of 20-50m and when returning to the colony they climb to altitudes up to 500m to avoid at...