Animal Research

When a zebra finch hears a new song from a member of its own species, the experience changes gene expression in its brain in unexpected ways, researchers report. The sequential switching on and off of thousands of genes after a bird hears a new tune offers a new picture of memory in the songbird brain.

Humans' ability to easily distinguish among many faces and recognize people they know goes way, way back, say researchers reporting online on June 25th in Current Biology, a Cell Press publication. That assertion stems from new evidence that, like us, rhesus monkeys tell their friends from foes by picking up on the precise layout of facial features.

Although worlds apart, the way fish learn could be closer to humans' way of thinking than previously believed, suggests a new research study.

What dog owner has not come home to a broken vase or other valuable items and a guilty-looking dog slouching around the house? Are dogs really expressing guilt?

Snake locomotion may seem simple compared to walking or galloping. But in reality, it's no easy task to move without legs. Previous research has assumed that snakes move by pushing off of rocks and debris around them. But a study published this week in the Proceedings of the National Academy of Sciences says that it's all in their design--specifically, their scales.

Humans, from ancient exchanges of food to modern day home mortgages, have bartered or traded to receive something that they couldn't achieve on their own. It's the basis of the economy, and it requires a leap of faith to believe that each party will receive a payoff in return for taking a risk.

Bats can use the characteristics of other bats' voices to recognize each other, according to a study by researchers from the University of Tuebingen, Germany and the University of Applied Sciences in Konstanz, Germany. The study, published June 5 in the open-access journal PLoS Computational Biology, explains how bats use echolocation for more than just spatial knowledge.

The effects of H1N1 swine flu have been investigated in a group of piglets. Scientists writing in BioMed Central's open access Virology Journal studied the pathology of the virus, finding that all infected animals showed flu-like symptoms between one and four days after infection and were shedding virus two days after infection.

People aren't the only ones who've got rhythm. Two reports published online on April 30th in Current Biology, a Cell Press publication, reveal that birds – and parrots in particular – can also bob their heads, tap their feet, and sway their bodies along to a musical beat.

Fish don't make noises or contort their faces to show that it hurts when hooks are pulled from their mouths, but a Purdue University researcher believes they feel that pain all the same.

Keeping warm isn't the only reason lizards and other cold-blooded critters bask in the sun. According to a study published in the May/June issue of Physiological and Biochemical Zoology, chameleons alter their sunbathing behavior based on their need for vitamin D.

The trade in Sumatran orangutans for pets shows little sign of decline and is taking the species to the brink of extinction, a report concludes.

Wild female chimpanzees copulate more frequently with males who share meat with them over long periods of time, according to a study led by researchers from the Max Planck Institute for Evolutionary Anthropology in Germany, published in the open-access, peer-reviewed journal PLoS ONE April 8.

We all know that people sometimes change their behavior when someone is looking their way. Now, a new study reported online on April 2nd in Current Biology, a Cell Press publication, shows that jackdaws--birds related to crows and ravens with eyes that appear similar to human eyes--can do the same.

February's brutal chimpanzee attack, during which a pet chimp inflicted devastating injuries on a Connecticut woman, was a stark reminder that chimps are much stronger than humans--as much as four-times stronger, some researchers believe. But what is it that makes our closest primate cousins so much stronger than we are?