insects
sb admin | April 9, 2009
Argentine ant (Linepithema humile) worker and queen
Córdoba, Argentina
photo details: Canon MP-E 65mm 1-5x macro lens on a Canon EOS 20D
ISO 100, f/13, 1/250 sec, twin flash diffused through tracing paper
awild | April 2, 2009
Kalathomyrmex emeryi (Forel 1907), Argentina.
In Zootaxa last week, Christiana Klingenberg and Beto Brandão introduced to the world an entirely new genus of fungus-growing ant, Kalathomyrmex. Yet the single species, K. emeryi, is a widespread neotropical insect that has been known for over a century. In fact, I photographed it twice during my recent trip to Argentina. How does this happen, a new genus devoid of novel species?
The answer is understandable in light of the distinct pattern of evolution among the fungus growing ants, revealed in a 2008 study by Ted Schultz and Sean Brady…
grrlscientist | April 2, 2009tags: Bumblebees, Bombus species, Hymenoptera, insects, entomology, natural history
Common Eastern Bumblebee, Bombus impatiens.
This species is often relied upon to pollinate commercial food crops,
such as tomatoes, that are often grown in agricultural greenhouses.
Image: Wikipedia [larger view].
The Bumblebees, Bombus species, are among the most popular of all insects. Their black-and-yellow fuzz, large round bodies, and bumbling, buzzing flight make them appear almost cuddly, almost like the "teddy bears" of insects. I have many childhood memories of watching these appealing gentle…
awild | March 28, 2009
Nemognatha Blister Beetle, California.
Some of the oddest blister beetles in western North America are in the genus Nemognatha. Their mouthparts have become elongate to form a proboscis- a common trait among other groups of insects- but rare among the beetles. They are commonly seen on flowers feeding on nectar.
Nemognatha with associated Notoxus beetles, Nevada.
photo details: Canon MP-E 65mm 1-5x macro lens on a Canon EOS D60
ISO 100, 1/200 sec, f/13, flash diffused through tracing paper
edyong | March 27, 2009Termite colonies are families - millions of individual workers all descended from one king and one queen. But the colony itself tends to outlast this initial royal couple. When they die, new kings and queens rise to take their place. These secondary royals are a common feature of some families of termites, and they will often mate with each other for many generations. But there is more to this system than meets the eye.
Kenji Matsuura from Okayama University has found that the secondary queens are all genetically identical clones of the original. There are many copies, and they have no…
awild | March 21, 2009
Omoglymmius, wrinkled bark beetle (Rhysodini). California.
Rhysodine beetles make their living feeding on slime molds under the bark of decaying trees . They are instantly recognizable from the grooves on their backs and from their distinctly moniliform (bead-like) antennae. The taxonomic placement of these insects is controversial, but genetic evidence suggests they are a highly specialized lineage of Carabidae, the ground beetles.
photo details: Canon MP-E 65mm 1-5x macro lens on a Canon EOS D60
ISO 100, 1/200 sec, f/13, flash diffused through tracing paper
edyong | March 20, 2009There are so many fascinating stories about parasitic wasps that they have become a regular feature in this blog. Usually, their prey come off poorly in these tales, with caterpillars being reduced to little more than living, paralysed larders for macabre wasp grubs. But not always - some hosts don't take the invasion of their bodies lying down. This post is an attempt to redress the balance between parasite and host, by telling the story of the caterpillar that fights back... with medicine.
One species of tiger moth, Grammia incorrupta, has a fuzzy caterpillar called the woolly bear. Like…
awild | March 13, 2009
Lucidota atra, the black firefly. New York.
Not all fireflies luminesce. Lucidota atra is a day-flying species, common in eastern North America, with vestigial light-producing organs.
photo details: Canon MP-E 65mm 1-5x macro lens on a Canon EOS D60
ISO 100, 1/200 sec, f/13, flash diffused through tracing paper
edyong | March 8, 2009
Imagine that you're driving along a country lane. As often happens, the road suddenly transforms from a well-paved street to a pothole-ridden nightmare. As your suspension and your stomachs start to tire, your friends in the back suddenly force you to stop the car.
To your amazement, they jump out and lie across the potholes, beckoning you to drive your car over them. It may seem like a far-fetched scenario, but if you were an army ant, such selfless behaviour would be a matter of course.
Army ants are some of the deadliest hunters of South America. Amassing in legions of over 200,000 ants…
awild | March 5, 2009This photo was ultimately rejected for a journal cover (it was the wrong shape!) but I shot it to accompany a research article that used museum specimens of midwestern bumblebees to compare current levels of genetic diversity with previous decades. Since this image won't appear in print anytime soon, I thought I'd share it here instead.
photo details: Canon 35mm f2.0 prime lens on a Canon EOS 20D
ISO 200, 1/125 sec, f/5, indirect strobe
edyong | March 1, 2009If you've ever complained about having bad sex, you really have no idea. Human women may have to complain about poor stamina or incompetent technique but the female seed beetle (or bean weevil; Callosobruchus maculatus) has to contend with her partner's nightmarish penis - an organ covered in hard, sharp spikes. Just see if you can look at the picture on the right without wincing.
It's no surprise then that females sustain heavy injuries during sex. But why have male beetles evolved such hellish genitals? What benefits do they gain by physically harming their partners?
It's possible that…
awild | February 28, 2009
Gnamptogenys mordax, Venezuela.
photo details: Canon MP-E 65mm 1-5x macro lens on a Canon EOS 20D
ISO 100, 1/250 sec, f/13, flash diffused through tracing paper
awild | February 27, 2009
Just a reminder. The infamous annual Insect Fear Film Festival (this year's theme: centipedes!) is happening tomorrow night on campus here in Urbana-Champaign.
More information:
http://www.life.uiuc.edu/entomology/egsa/ifff.html
awild | February 26, 2009A comment left on this blog last week alerted me to the sublime glasswork of artist Wesley Fleming. Wow. Not only are the pieces aesthetically stunning, they are also largely anatomically accurate. Legs attached to the right spots, tarsal segments counted out, tibial spurs in place.
If you have a few minutes, do yourself a favor and visit Fleming's gallery.
awild | February 25, 2009
Solenopsis geminata, the tropical fire ant
The latest upload concerns three species in the subfamily myrmicinae that have been traveling about the globe with human commerce. Solenopsis geminata, the tropical fire ant, is the most worrying of these tramps, but the other two, Pheidole moerens and P. obscurithorax, are rather poorly known and probably merit more study than they receive. Click to visit the gallery.
Incidentally, if I'd known at the time that Solenopsis geminata confers hero status on their collectors, I'd defintely have spent more time pointing them out to everyone within…
edyong | February 25, 2009Imagine that a massive hole appeared in a wall of your house, and you'd decided to fix it yourself. You head over to a DIY store and load up on plaster, tools and paint and look forward to many hard and tedious hours of work. If that seems like a chore, you might get some perspective by considering the plight of the gall aphid Nipponaphis monzeni. When holes appear in their homes, some unlucky individuals are tasked with repairing the damage using their own bodily fluids. They sacrifice themselves for the sake of some DIY.
Some species of aphids are heading towards the incredibly cooperative…