Category Archives: Arthropods

Lesser grass blue butterflies

Lesser grass blue butterflies

Lesser grass blue butterflies and a spiderThe lesser grass blue butterfly (Zizina otis) was first seen in Hawaii on Oahu in 2008 (for an article, or most of an article, about the find, click here). They’re now well established on the Big Island as well.

Lesser grass blues are very small, with a wingspan no more than ¾-inch. With wings folded up they’re the size of a small fingernail. They also fly close to the ground, within a foot or two.

Lately, I’ve been seeing them in large numbers on these blue heliotrope (Heliotropium amplexicaule) flowers. When I say ‘seeing them,’ what I mean is that when I walk past a patch of these flowers, a host of lesser grass blues will flutter up from the flowers, dance around in a tizzy for a few moments, and then settle back down again. When they do this, it’s like blue confetti being thrown (a few inches) into the air.

I’ve tried to capture this image with my camera, but haven’t been able to (and I’ve taken LOTS of photos). The butterflies are so small, I’m tall, and the effect is fleeting. But the top photo gives an idea of what’s going on, with three lesser grass blues homing in on the small blue heliotrope flowers while a fourth has already found a spot.

It wasn’t until I processed the photos at home that I noticed the spider in the second photo. I don’t know what it made of all the butterfly activity. I hope they weren’t its prey.

Wandering glider dragonfly

Wandering glider dragonfly on a twig

Wandering glider dragonflyThe wandering glider (Pantala flavescens) is a fairly common dragonfly with a worldwide distribution, but it’s not one I’ve previously photographed. This isn’t for lack of trying.

I like dragonflies, so I’m always lured in when I see them flitting around. I figure that, even though they’re in motion, I should be able to get a photo because they often fly back and forth over small areas looking for food. So I’ve taken hundreds of dragonfly photos, many of which have a bit of dragonfly in them, some of them a whole dragonfly, a few where the dragonfly is fuzzy but identifiable, one or two that look pretty good.

This was another of those days. There were three or four dragonflies in the area and I was shooting photos with my usual success rate when I saw one of them settle. This one was clearly not familiar with dragonfly rules of conduct, which state: 1. Remain in constant motion if photographers are present. 2. If you must rest, make sure you aren’t observed.

Cashing in on my luck, I got several photos before the dragonfly flew off. I took a few more futile flying shots and was about to leave, when the same dragonfly landed again in almost the same spot. I particularly like the single yellow-brown cell in each of the wings, which is a handy identifier.

Giant centipede

Centipede Scolopendra subspinipes

Centipede exploringThis centipede (Scolopendra subspinipes) is also known as the Vietnamese centipede, Asian forest centipede, and Chinese red-headed centipede, among other names. Some of these names are unprintable when uttered by someone who has just been bitten by one. The bite can cause extreme pain and can be dangerous if a person is allergic to the venom, but is not generally considered life-threatening.

The venom is delivered through a pair of modified legs, known as forcipules, located just behind the centipede’s head. For this reason, it’s useful to figure out which end is the head, but this isn’t always immediately apparent, as both ends have some similarity in appearance.

The centipede is the alpha creepy-crawly here in Hawaii. This one was about five inches long, but they can be much longer. (For anyone who has the nerve to read a story — and see a photo — about one of these that measured in at 14.5 inches long, click here.)

This was a good place to spot this centipede, outdoors on a dirt road. There are few worse feelings than spotting a centipede in the house, scurrying across the floor (they move fast), and disappearing into a tiny, inaccessible crack. This means that a general understanding that centipedes live in and around dwellings is replaced by the certain knowledge that there’s one in the same room.

Since most bites occur from unexpected encounters, such as when a centipede has crawled into someone’s shoe, or in a towel, or made itself comfy in a bed, when I see a centipede inside, I usually become more vigilant for a while.

I haven’t been bitten yet, but I know the chances are it won’t happen when I see a centipede, or when I’m being vigilant. It will be when I’m engrossed in something, such as writing on my computer, and I lean back and wonder, in a last moment of innocence, ‘what the heck is that tickling my neck?’ Aaaaaaargh.