News: Bees Can Recognize Human Faces

[abracanabra]

Linked from BoingBoing:

The researchers, with Johannes Gutenberg University in Mainz, Germany, tried to train the bees to realize that a photo of one man had a drop of a sugary liquid next to it. Different photos came with a drop of bitter liquid instead.

A few bees apparently failed to realize that they should pay attention to the photos at all. But five bees learned to fly toward the photo horizontally in such a way that they could get a good look at it, Dyer reported. In fact, these bees tended to hover a few centimeters in front of the image for a while before deciding where to land.

The bees learned to distinguish the correct face from the wrong one with better than 80 percent accuracy, even when the faces were similar, and regardless of where the photos were placed, the researchers found. Also, just like humans, the bees performed worse when the faces were flipped upside-down.

...The bees probably don’t understand what a human face is, Dyer said in an email. “To the bees the faces were spatial patterns (or strange looking flowers),” he added.

Bees are famous for their pattern-recognition abilities, which scientists believe evolved in order to discriminate among flowers. As social insects, they can also tell apart their hivemates. But the new study shows that they can recognize human faces better than some humans can—with one-ten thousandth of the brain cells.

...Dyer said that if bees can learn to recognize humans in photos, then they reasonably might also be able to recognize real-life faces. On the other hand, he remarked, this probably isn’t the explanation for an adage popular in some parts of the world—that you shouldn’t kill a bee because its nestmates will remember and come after you.

Francis Ratnieks of Sheffield University in Sheffield, U.K., says that apparent bee revenge attacks of this sort actually occur because a torn-off stinger releases chemicals that signal alarm to nearby hivemates. Says Dyer, “bees don’t normally go around looking at faces.”

Pop-science article link (here quoted): World-net
Hard-science article link: Journal of Experimental Biology