September 13, 2014
Every once in a while, those of us here at BioSCAN actually venture beyond the borders of Los Angeles. Sometimes when we do, we come back with insects. I was particularly excited by a couple of common, yet beautiful, insects I picked up in the South-Eastern Sierras this summer, so I thought I'd share them with you!
Photo of cicada by Kelsey Bailey.[/caption] The beauty above is a cicada, family Cicadidae. Although they are not commonly found in Los Angeles (although we did hear, and then locate, one in the NHMLA Nature Garden not long ago), cicadas of many species are found throughout California. Most cicadas have a lifespan between 2 and 5 years, with the lifespan of some species as long as 13–17 years! I collected this beauty at my annual family campout in the Sierras; from what we remember, we have a "cicada year" about every 6 or 7 years. We know as soon as we step out of our cars at the campsite when the cicadas are around — the noise is deafening! The discarded shells of the immature cicadas (called exuviae) can be found on sagebrush and pinyon pines everywhere (below is a photograph of one on a pinyon trunk).
Photo of cicada exuvia by Emily Hartop. The majority of a cicada's life is spent underneath the ground as a flightless immature, munching on plant roots. Once the cicadas emerge from the ground, crawling up shrubs and trees to molt into the beautiful winged adults, they only live a few days. As with quite a number of insects, the one job of the adult insect is to mate. The specimen up top and the one below were actually collected after the cicadas had passed away of natural causes.
Photo of cicada by Kelsey Bailey. Don't let the beautiful eyes of this next insect fool you, these flies give a nasty bite! They are deer flies from the family Tabanidae, but I have known them since childhood simply as the dreaded "green flies" of summer.
Photo of tabanid by Kelsey Bailey.One look at the mouthparts of these critters and it's no surprise the bite hurts — tabanids use their mouthparts to slash at your skin and then lap up the blood. Luckily for my family at our campout, they are also incredibly slow and easily killed. Family members managed to swat quite a few of these flies for me to take home as specimens!
Banded-Wing Dragonfly photo by Emily Hartop.I'll leave you with a picture of a beautiful banded-wing dragonfly that perched on my car antenna. This was the closest I got before it flew away, it would have been lovely to grab a better image. Dragonfly nymphs live in running water, and are amazing predators (watch this video and I guarantee you will be impressed!). This dragonfly probably lived in the South Fork of the Kern River, not far from where I spotted it at the campsite. ...and that concludes bugs OUTSIDE of BioSCAN. We'll be back to our normally scheduled programming next week.