entomology
awild | January 25, 2009
Tonight's selection was suggested for your viewing pleasure by Jack Longino.
awild | January 20, 2009New Orleans, January 2009
The first major public exhibit to open in New Orleans after Hurricane Katrina was the Audubon Nature Institute's Insectarium. We took advantage of a lull in our schedule last week to make the pilgrimage to what turns out to be a surprisingly ambitious operation. It well exceeded our expectations.
The entrance on Canal Street.
Spying on live bumblebees.
Inside the bees' nest.
Yes, educational bits too.
This ant looks familiar.
Not a family exhibit: stick insects have sexual relations in public.
They let non-insects in too.
Another one.
The proud…
awild | January 8, 2009
Sericomyrmex amabilis in its fungus garden, Panama
photo details: Canon MP-E 65mm 1-5x macro lens on a Canon EOS 20D
ISO 100, 1/250 sec, f/13, twin flash diffused through tracing paper
awild | January 4, 2009
leafcutter ant mating swarm, Arizona
The sparkle of these insects' wings was captured by pointing the camera at the sun while standing behind the mating swarm. I find backlighting to be one of the most pleasing effects for translucent wings.
photo details: Canon 100mm f2.8Â macro lens on a Canon EOS 20D
ISO 100, f/11, 1/500 sec
awild | December 31, 2008
A long-tongued horse fly takes a sip of nectar in Arizona's Chiricahua mountains.
100% crop of the same image.
photo details: Canon 65mm MP-E 1-5x macro lens on a Canon EOS 20D
ISO 100, f/13, 1/250 sec, flash diffused through tracing paper
awild | December 17, 2008In an earlier post I listed my favorite insect images of the year taken by other photographers. Now it's my turn. Here is the best of my own work over the last 12 months.
Laccophilus pictus, Arizona
Dinoponera australis, Argentina
Parasitic Cotesia wasp attacks a Manduca larva
Polyrhachis schlueteri, South Africa
Crematogaster tricolor, South Africa
Weaver Ant (Oecophylla longinoda), South Africa
Rose Aphids (Macrosiphum rosae), Arizona
Thaumatomyrmex atrox, Venezuela
Simopelta queen and workers, Venezuela
Pheidole obtusospinosa, Arizona
Harpegnathos saltator, India
awild | December 5, 2008
Metrius contractus
Oregon, USA
Many biologists are familiar with the Bombardier Beetles in the ground beetle tribe Brachinini, as their defensive tactic of aiming an explosive spray has been studied extensively. The Brachinini are even celebrated by creationists as animals that couldn't possibly evolve.
As it turns out, though, bombardiers have evolved at least twice. The second, less known radiation comprises the subfamily Paussinae, also in the Carabidae, and as we'd expect from an independent origin the spray dispersing mechanism is different, using a flange instead of a nozzle. …
awild | December 3, 2008
Linepithema flavescens, last seen in 1934
Linepithema flavescens, a small yellow ant from Haiti, is one of the species I re-described as part of my Ph.D. dissertation. All we know about this ant, apart from the brief notes on the specimen labels, is the external appearance of a few workers. Queens and males haven't been collected. No one has studied its ecology or behavior. The few existing museum specimens- gathered from two different field sites- may be too valuable to attempt DNA extraction.
A 1934 collection is the last time anyone has ever seen L. flavescens. As the natural…
awild | November 23, 2008I've posted enough Friday Beetles that I can no longer remember which species I've already done. Some species were almost posted twice out of sheer forgetfulness. Must be the academic scatter-brain.
So to keep them all straight I've made a list. This is mostly for my own good. In any case, here is the Friday Beetle Directory:
Adranes - Ant-Nest Beetle
Onthophagus gazella - Gazelle Scarab
Dineutes sublineatus - Whirligig Beetle
Lutrochus - Travertine Beetle
Scaphinotus petersi - Snail-eating Beetle
Laccophilus pictus - Predaceous Diving Beetle
Apteroloma caraboides - Snowfield Beetle…
awild | November 22, 2008
I sometimes wonder if a major reason why most people don't really get insects is the difference in pace between how we and how the insects move in the world.
Insects live faster than we do, their everyday motions an erratic, unintelligible blur to our sluggish perceptions. But slow them down so that we can see them on their own terms, and they seem almost as different creatures, more deliberate, more wise, and certainly much less buggy.
awild | November 18, 2008
A young adult Comperia merceti, a parasitoid wasp in the family Encyrtidae, emerges from the egg case of its cockroach host.
photo details: Canon MP-E 65mm 1-5x macro lens on a Canon EOS 20D
ISO 100, f/11, 1/200 sec, flash diffused through tracing paper
awild | November 14, 2008
Nosodendron californicum - Wounded Tree Beetle
California, USA
From the Department of Really Obscure Insects, here's a beetle that few non-specialists will recognize. Nosodendron inhabits the rotting tissue of long-festering tree wounds. These beetles are not rare so much as specialized to an environment where few entomologists think to look.  If you can spot the telltale stains of an old wound on the trunks of large trees, you should be able to find Nosodendron. They feed on the microbes- the yeast and bacteria- that grow in the sap leaking from the phloem.
There are, in fact, whole…
awild | November 7, 2008
Chrysina beyeri - Beyer's Scarab - Arizona
Arizona's Jewel Scarabs emerge after the onset of summer rains. These large insects have something of a cult following among collectors, and enthusiasts from around the world descend on the Sonoran desert every monsoon season with their mercury vapor lamps and blacklights to entice the lumbering beetles into their traps. The effects of this mass harvesting on Chrysina populations have not been studied, but they should be. I'd hate to lose such an attractive species.
Beyer's scarab, the largest Chrysina in the United States, feeds on oak foliage…
awild | October 27, 2008
Jim Wetterer has a paper out in Myrmecological News detailing the global spread of the ghost ant Tapinoma melanocephalum. This diminutive dolichoderine is quite possibly the most widely distributed ant in the world, a hitchhiker on human globalization, thriving in the wake of human-wrought ecological destruction. Their cosmopolitan dominance reflects our own.
Oddly enough, we still don't even know where they originally lived.
Ghost Ants - photo by Picasa user Aimeric
citation: Wetterer, J. K. 2008. Worldwide spread of the ghost ant Tapinoma melanocephalum (Hymenoptera: Formicidae). …
awild | October 24, 2008
Chrysochus auratus - Dogbane Leaf Beetle
New York
At first glance one might mistake the dogbane leaf beetle for a creature of the tropical jungle, an exotic jewel sought after by the most discerning of collectors. But no. It's a rather common beetle in northeastern North America, where it feeds on plants in the Dogbane family Apocynaceae. I photographed this one a few years ago on a rainy summer day in upstate New York.
photo details: Canon MP-E 65mm 1-5x macro lens on a Canon D60
ISO 100, f/13, 1/200 sec, flash diffused through tracing paper
awild | October 22, 2008
Adetomyrma sp. "mad-01", larvae and adults
Madagascar
With a name like "dracula ant" you'd think these waspy little Adetomyrma might suddenly lunge for your jugular. But they are shy creatures, drinking not the blood of hapless victims but sparingly from the hemolymph of their own larvae. It's an odd behavior, yet one that makes a certain amount of sense when considering the haphazard way that evolution works.
Here's the problem: ants have a skinny little waist through which their digestive tract must pass. Solid food would lodge in the bottleneck and kill the ant, so the ants can't eat…
awild | October 20, 2008I've blogged a lot about lady beetles recently. That's because we have been inundated by them ever since moving to Illinois. The beetle deluge is not a good thing, though, as ours are nearly all Harmonia axyridis, an extraordinarily pesty species imported from Asia in what must rank as one of the most poorly executed biological control projects ever. In the wake of the alien lady beetle invasion, our native species have all but disappeared.
Enter the Lost Ladybug Project. The project is a citizen-science initiative out of Cornell University to gather information on the distribution of…
awild | October 14, 2008
Iridomyrmex reburrus
Highlights from the recent technical literature:
Savanna ants more resistant to fire than forest ants. Parr & Andersen. 2008. Fire resilience of ant assemblages in long-unburnt savanna of northern Australia. Austral Ecology. doi: 10.1111/j.1442-9993.2008.01848
Abstract: Tropical savannas and rainforests contrast in their flammability and the fire resilience of their associated species. While savanna species generally exhibit high resilience to burning, there is much debate about the fire resilience of forest-associated species, and the persistence of forest patches…
awild | October 12, 2008Here's a question for my myrmecologist readers. Has anyone published observations of ritualized fighting among colonies of Pogonomyrmex harvester ants? I know such behavior was famously studied by Bert Hoelldobler in Myrmecocystus, and that ritual combat has been noted in Camponotus and Iridomyrmex. The reason I ask is that the pogos in my front yard back in Tucson would engage in what looks like the same sort of behavior. Ants from opposing colonies stand up on little stilt-legs and push each other about without anyone getting hurt.
I suspect these non-lethal ways of establishing…