Tagged: Insects

Monarch butterflies that once covered 50 square acres of forest during their summer layover in central Mexico now occupy fewer than 3 acres, according to the latest census.

The numbers of the orange-and-black butterflies have crashed in the two decades since scientists began making a rough count of them, according to Mexico's National Commission of Natural Protected Areas.

At a news conference Wednesday, the commission said the count was down 59 percent from December 2011 levels, when the insects filled 7.14 acres of fir trees in central Mexico.

Transcript

SCOTT SIMON, HOST:

If it just sounded like this, might not be all that bad.

(SOUNDBITE OF GRASSHOPPER)

SIMON: That's a grasshopper, and this is the sound of what happens when grasshoppers go biblical, and become a swarm of locusts.

(SOUNDBITE OF SWARM OF LOCUSTS)

SIMON: Just such a swarm of locusts have entered Israel's Negeve desert on Friday and that's bad news for farmers because the insects eat everything that's green.

Who knew that the flower nectar of citrus plants — including some varieties of grapefruit, lemon and oranges — contains caffeine? As does the nectar of coffee plant flowers.

And when honeybees feed on caffeine-containing nectar, it turns out, the caffeine buzz seems to improve their memories — or their motivations for going back for more.

"It is surprising," says Geraldine Wright at Newcastle University in the the U.K., the lead researcher of a new honeybee study published in the journal Science.