insects
edyong | May 12, 2008A common wasp on a foraging mission catches an enticing scent on the breeze. It's a set of chemicals given off by plants that are besieged by hungry insects and it means that there is food nearby for the wasp's grubs - caterpillars. The wasp tracks the smell to its source - a flower - and while it finds nectar, there are no caterpillars and it leaves empty-mandibled. The smell was a trick, used to dupe the wasp into becoming a unwitting pollinator for the broad-leaved helleborine.
The broad-leaved helleborine (Epipactis helleborine) is an orchid that grows throughout Europe and Asia. It is…
edyong | May 8, 2008
A tenth of the planet's population occasionally suffers through devastating famines because small insects fear being bitten in the bum. That's the astonishing message from a new study of one of mankind's greatest pests - the desert locust.
Swarms can stretch for several hundred square kilometres and each of these harbours up to 80 million hungry sets of mandibles that eat their own body weight in food every day. These plagues are unpredictable but they only form when locust populations reach some sort of critical mass. Desert locusts are two insects for the price of one; at a crowded…
edyong | April 23, 2008In the story of climate change, humans and the carbon dioxide we pump into the atmosphere are the villains of the piece. Now, it seems that we have an accomplice and a most unexpected one at that. It lives in the pine forests of North America and even though it measures just 5 millimetres in length, it is turning these woods from carbon sinks into carbon sources. It's the mountain pine beetle.
The beetle bores into pine trees and feeds from nutrient-carrying vessels called phloem. It also lays its eggs there. Once a beetle has colonised a pine, it pumps out pheromones that attract others,…
grrlscientist | April 12, 2008tags: What Bugged the Dinosaurs?, dinosaurs, insects, disease, George Poinar, Roberta Poinar, book review
I grew up with a fondness for dinosaurs. Their unbelievable size, their peculiar shapes, and their undeniable absence from the world as I knew it were all sources of fascination. But never once did I think of the dinosaurs as being plagued by biting insects and other blood-sucking arthropods; mosquitoes, flies, ticks and mites were creatures that haunted camping trips, picnics and attics, not the majestic dinosaurs! But according to the new book, What Bugged the Dinosaurs? Insects,…
edyong | March 4, 2008The transformation from caterpillar to butterfly or moth is one of the most beguiling in the animal world. Both larva and adult are just stages in the life of a single animal, but are nonetheless completely separated in appearance, habitat and behaviour. The imagery associated with such change is inescapably beautiful, and as entrancing to a poet as it is to a biologist.
According to popular belief, within the pupa, the caterpillar's body is completely overhauled, broken down into a form of soup and rebuilt into a winged adult. Richard Buckmister Fuller once said that "there is nothing in a…
edyong | February 27, 2008
Male insects have a tough time of it. Aside from the usual threats of predators, competitors and the odd hungry female, many are plagued by discriminatory parasites intent on killing them, while leaving their female peers unharmed. These "male-killers" are incredibly successful and infect a wide range of insects, who are themselves a very successful group. One of these killers, a bacteria known as Wolbachia, may well be the world's most successful parasite.
The male-killers are paragons of selfishness. Their success hinges on successfully infecting females, for whithin egg cells, they find…
grrlscientist | February 12, 2008tags: giraffe weevil, Trachelophorus giraffa, photography, subway art, AMNH, NYC, NYCLife
A giraffe weevil, Trachelophorus giraffa,
as portrayed in tiles on the walls of the NYC uptown subway stop (A-B-C)
at 81st and Central Park West. (ISO, no zoom, no flash).
Image: GrrlScientist 2008. [wallpaper size].
Read more about the AMNH tile artworks and see the AMNH tile artworks photographic archives -- with all the animals identified.
grrlscientist | February 11, 2008tags: beetle, insect, photography, subway art, AMNH, NYC, NYCLife
The tiger beetle, Cicindela formosa,
as portrayed in tiles on the walls of the NYC uptown subway stop (A-B-C)
at 81st and Central Park West. (ISO, no zoom, no flash).
Image: GrrlScientist 2008. [wallpaper size].
Read more about the AMNH tile artworks and see the AMNH tile artworks photographic archives -- with all the animals identified.
grrlscientist | February 7, 2008tags: katydid, insects, invertebrates, photography, subway art, AMNH, NYC, NYCLife
I think this is a species of Katydid,
as portrayed in tiles on the walls of the NYC uptown subway stop (A-B-C)
at 81st and Central Park West. (ISO, no zoom, no flash).
Image: GrrlScientist 2008. [wallpaper size].
Read more about the AMNH tile artworks and see the AMNH tile artworks photographic archives -- with all the animals identified.
zooillogix | January 25, 2008We don't like posts that simply link to other sites because we want you to hang out here. We picture you sitting at home in a bathrobe, drinking coffee, wearing bunny slippers and chortling with an English accent as you peruse Zooillogix. Sometimes we have to make exceptions though...
This article in Cracked is crude, profanity laced, unscientific and utterly hilarious. Check it out here.
For those of you too lazy to click your mouse on the link, we have reposted one of the five below.
There are about 10,000,000,000,000,000,000 insects on earth at any given moment. Seriously, that's a real…
grrlscientist | January 24, 2008tags: researchblogging.org, neotropical ants, Cephalotes atratus, parasitic nematodes, Myrmeconema neotropicum, tetradonematid nematode, evolution, coevolution, fruit mimicry
A neotropical black ant, Cephalotes atratus,
infected with the newly described parasitic nematode,
Myrmeconema neotropicum.
The ant's infected and swollen abdomen does not actually take on a red pigment.
It becomes a translucent amber. With the yellowish parasite eggs inside and a touch
of sunlight, it appears bright red.
Image: Steve Yanoviak, University of Arkansas.
In the first known example of a parasite…
grrlscientist | January 23, 2008tags: ants, The Secret Megalopolis of the Ants, ant nest, streaming video
This is a video of scientists pouring ten tons of liquid concrete into an ant colony, waiting several weeks for it to set, then digging it up. In doing so, they learned that the structure covers 538 square feet and travels 26 feet into the earth. To build it, the ant colony moved 40 tons of soil -- billions of ant loads of soil were brought to the surface. Each load weighed four times as much as the worker ant, and in human terms, was carried over 1/2 mile to the surface. It's amazing what evolution can construct, don't…
clock | January 7, 2008
I had no time to read this in detail and write a really decent overview here, perhaps I will do it later, but for now, here are the links and key excerpts from a pair of exciting new papers in PLoS Biology and PLoS ONE, which describe the patterns of expression of a second type of cryptochrome gene in Monarch butterflies.
This cryptochrome (Cry) is more similar to the vertebrate Cry than the insect Cry, also present in this butterfly. The temporal and spatial patterns of expression of the two types of Cry suggest that they may be involved in the transfer of time-information from the…
grrlscientist | January 3, 2008tags: dragonfly, insects, National Geographic, Image of the Day
Dragonfly.
I found this little guy on one of the hostas this summer; he was covered in dew, sleeping.
Image: Noah Rosen 2007 (photo appears here with permission by National Geographic). [larger view].
grrlscientist | January 2, 2008tags: dung beetle, insects, National Geographic, Image of the Day
Dung beetle.
Racing to complete a day's work, a dung beetle loses control of its prize possession on the tar road that runs through Kruger National Park, South Africa.
Image: Scott Francis 2007 (photo appears here with permission by National Geographic). [larger view].
mikethemadbiologist | December 19, 2007
...the Chikungunya virus might have something to say about that (if it could speak). From PLoS Pathogens:
Chikungunya virus (CHIKV) is an emerging arbovirus associated with several recent large-scale epidemics of arthritic disease, including one on Reunion island, where there were approximately 266,000 cases (34% of the total island population). CHIKV is transmitted by Aedes species mosquitoes, primarily Ae. aegypti. However, the 2005-2006 CHIKV epidemic on Reunion island was unusual because the vector responsible for transmission between humans was apparently the Asian tiger mosquito, Ae.…
grrlscientist | December 1, 2007
Red-eyed tree frog, Agalychnis calidryas.
Red-eyed tree frogs live in Costa Rica and other Neotropical regions. Their bright red eyes presumably startle would-be predators. Their diet consists of flies and moths, and possibly includes smaller frogs and crickets. All tree frogs are classified into the families Hylidae and Rhacophoridae. Many tree frogs are green in color, while the terrestrial and aquatic species have muted coloration.
Image: Don Farral (Photodisc) via National Geographic.
Since the holidays are advancing upon us like a rampaging SUV, I thought I'd talk about an essential…
grrlscientist | November 14, 2007tags: the world's most deadly animal, streaming video
Do you know what the world's most deadly animal (for humans) is? The grizzly bear? Or wolves? Or maybe the humble hippopotamus? There is a streaming video below the fold that answers this question. [1:58]
The females of most mosquito species suck blood (hematophagy) from warm-blooded animals. This has made mosquitoes one of the most deadly vectors known to man, killing millions of people over thousands of years and continuing to kill millions per year through the spread of diseases.
mikethemadbiologist | October 15, 2007...they're after you? Are we being spied upon by bug-like robots? There have been three independent sightings according to the Washington Post:
Vanessa Alarcon saw them while working at an antiwar rally in Lafayette Square last month.
"I heard someone say, 'Oh my god, look at those,' " the college senior from New York recalled. "I look up and I'm like, 'What the hell is that?' They looked kind of like dragonflies or little helicopters. But I mean, those are not insects."
Out in the crowd, Bernard Crane saw them, too.
"I'd never seen anything like it in my life," the Washington lawyer said…
clock | October 9, 2007Another thing I will also have to miss - the Inaugural Event of the 2007-2008 Pizza Lunch Season of the Science Communicators of North Carolina (SCONC), on October 24th at Sigma Xi Center (the same place where we'll have the Science Blogging Conference). Organized by The American Scientist and the Burroughs Wellcome Fund, the first Pizza Lunch Session will feature Dr.Fred Gould, professor of Entomology and Genetics at NCSU (whose Insect Ecology class blows one's mind - one of the best courses I have ever taken in my life). Fred recently received The George Bugliarello Prize for an…