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Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
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ScienceShot: A Bat's Sexy Sound
2 October 2012 7:01 pm
Male greater sac-winged bats (Saccopteryx bilineata) use one song to attract females and another to defend their territory. They also vocalize to find food, bouncing sound waves off insects as they fly, a behavior known as echolocation. Researchers wondered if those sounds might also communicate social information, the way you can often tell the sex of another person by their voice—even if he or she is just ordering a double tall skim latte with sugar-free vanilla syrup. The scientists caught bats in mist nets, measured their forearms, determined their sex, and put tiny plastic bands on them. Then, they let them go and recorded their calls. The echolocation calls of females were slightly higher and shorter than those of males that lived nearby, even though the bodies of female bats are bigger. Bats from different places sounded different, too, the team reports online today in the Proceedings of the Royal Society B. The researchers also released single male and female bats near a colony where the males had already returned for the day. When a male flew in, the other males barked and sang territorial songs. When it was a female, the males erupted in courtship song.
See more ScienceShots.