Tag Archives: Coleoptera

The End is Near

Bronzed Tiger Beetle, Cicindela repanda

Late summer: shorter days and cooler nights. This week we’ve had frost most nights, and it’s still not the middle of September.

Last week, a walk along the damp sand and stone shoreline of the North Saskatchewan River found me overlooking a sandy opening up on the riverbank. a clearing in the shoreline tangle of plant growth about one metre up on the first terrace above the water. Beneath me, half sunk, a shatter’d visage lies darting over the sand, were about a half-dozen tiger beetles.

How to get sand in your lens…

A closer look at the open area revealed a scattering of the D-shaped holes that typify those used by Cicindelids. Leaning over the terrace, and carefully scanning the holes, I first found two with tiger beetles waiting near the entrances, just within the shadows. The darted back into the darkness as I drew near. Other holes showed more activity…the reversing rear-end of a beetle as it swept sand out-of-the-way before disappearing down the burrow again.

This is the end!

And the holes were relatively deep, judging from the time that it took for their little butts posterior abdomens to become visible again, their legs sweeping out still more sand. These are the tunnels for winter hibernation, and at some point in the season when the days remain too cold, they will stay down there. Before long the shifting sands will cover the holes, and tiger beetles will become just a memory until they, conditions permitting, emerge again in spring.

Kinda sounds like me…

(Image info: North Saskatchewan River, Edmonton, 5 September, 2014. Canon 5D Mk IICanon EF 100mm f/2.8 Macro USM Lens on a Kenko Teleplus PRO 300 DGX 1.4x AF Teleconverter. Lighting with a single diffused Canon Speedlite 270EX II. All photos ISO 200, 1/160 sec. @ f16. Image cropped and processed in Lightroom 5)

Posted in Alberta, Bugs, Canada, Cicindelidae, Coleoptera, Edmonton, Insect, macro, photography, Season, Summer Also tagged , , , , , , , , , , |

Pavel Krásenský Photographs Mating Strepsiptera

This is one of an amazing sequence photographed by Pavel Krásensky 

Male Strepsiptera approaching bee, by Pavel Krásenský

Male Strepsiptera approaching bee, by Pavel Krásenský

Strepsiptera or Twisted-wing parasites are a bizarre internal parasites of bees and wasps. Their life-cycle begins similar to the oil beetles (Meloidae).

From NC State University Entomology pages:

Strepsiptera share so many characteristics with beetles that some entomologists classify them as a superfamily of Coleoptera.  In fact, Strepsiptera and certain parasitic beetles (in the families Meloidaeand Rhipiphoridae) are among the very few insects that undergo hypermetamorphosis, an unusual type of holometabolous development in which the larvae change body form as they mature.  Upon emerging from their mother’s body, the young larvae, called triunguloids, have six legs and crawl around in search of a suitable host.  In species that parasitize bees or wasps, a triunguloid usually climbs to the top of a flower and waits for a pollinator.  When a host arrives, the larva jumps aboard, burrows into its body, and quickly molts into a second stage that has no distinct head, legs, antennae or other insect-like features.  These larvae grow and continue to molt inside the host’s body cavity, assimilating nutrients from the blood and non-vital tissues.  After pupating in the host, winged males emerge and fly in search of mates.  An adult female remains inside her host, managing to attract and mate with a male while only a small portion of her body protrudes from the host’s abdomen.  Embryos develop within the female’s body, and a new generation of triunguloid larvae begin their life cycle by escaping through a brood passage on the underside of her body.

See the whole sequence at Pavel’s blog, Macrophotography (use Google translate!). My Meloidae post can be seen at The Black Oil Beetle.

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Posted in Autumn, Blog Link, Coleoptera, Feature Photographer, Insect, Inspiration, macro, Mating, Meloidae, News, Parasitism Also tagged , , , , , , |

Ted MacRae shares Tips and Tricks for Field Photography of Wary Insects

I thought this webinar was locked-up by the ESA, but the video is now on Youtube, so everyone can see Ted’s excellent Adven webcast on photographing Tiger beetles and other insects. This is the first time that I can recall any bug photographer giving such detailed information on how to stalk bugs, and of course,  it is laced with many of his fine images.

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Posted in Bugs, Cicindelidae, Coleoptera, Feature Entomologist, Insect, Inspiration, macro, photography, Technique Also tagged , , , , , , , , , , |