Insects

Predator

  

Spied this guy after I picked a peach. 

 Can you see how huge this thing is? 

 This beastie is a wheel bug…a true bug related to assassin bugs (and stink bugs). 

A real predator. I mean…look at that mouth (apparently, if handled roughly, it gives a painful bite)! 

This true bug is the largest of its kind. It is also the only U.S. insect with a crest. Thankfully, it likes to stab and inject a paralytic toxin into soft-bodied insects like caterpillars and garden pests such as bean beetles. They like to hangout in fruit trees (thus the discovery in one of peach trees). 

A remarkable creature and an interesting find. Welcome to the orchard and garden(s)…eat all you want.

Great info from Tx A&M and from the U of Florida about this beneficial bug.

Leaf beetle

According to the Iowa State bug guide, this beetle is a leaf beetle (Calligrapha bidenticola):

Pretty beetle

Pretty beetle

Apparently, if this ID is true, I needn’t worry about it being on my purple pepper as it’s favorite foods are plants in the Asteraceae family.

Regardless, it is a pretty little thing.

Beneficial insect of amazing proportions!

Last night, as I went to rehang my towel after my shower, I noticed this insect on the wall (please ignore the fact that we don’t really have a wall):

What the???

What the???

I left my phone at home today, so thanks to Jordan for sending these pics to me…these just needed to be posted. Not startled? How about this one for some scale?

Holy mother of God what is that?

Holy mother of God what is that?

Ok. I was a bit rattled. That thing was HUGE! Scout was in the bathroom with me and noticed it. She got it a little agitated so its mandibles were rather aggressively seeking something to sample. I went to fetch Jordan…he was unimpressed because he had seen it and taken these pictures much earlier in the day.

Here is the skinny on what this thing is:

A female Eastern Dobsonfly.

From the University of Florida entomology website:

The eastern dobsonfly, Corydalus cornutus (Linnaeus), is one of our largest non-lepidopteran insects. Its larvae, known as hellgrammites, are the top invertebrate predators in rocky streams where they occur.

The hellgrammites live under stones or occasionally on snags where they feed on a variety of soft-bodied insects (often immatures of net-spinning caddisflies and blackflies) (McCafferty and Provonsha 1983). In captivity, they will feed on midge larvae or commercial aquarium fish foods such as freeze-dried tubifex worms or fish food flakes (Hoover et al 1988). Helgrammites molt (shed their exoskeletons) 10 to 12 times and require one to three years to complete their development.

When ready to pupate, hellgrammites leave the water and may pupate close to the water or travel up to 15 meters or more in search of a suitable site for pupation (Mangan 1994) – typically under a rock, log, or some type of debris that serves to maintain a moist environment. Exodus from the water of full-grown hellgrammites in a given location is fairly synchronous (within a few days). Voshell (2002) states that local residents along Virginia rivers report that thunderstorms trigger emergence of the hellgrammites – a phenomenon known locally as “hellgrammite crawling”. It is believed that the behavior is stimulated by the vibrations from the thunder.

Upon reaching a suitable site for pupation, the hellgrammite typically digs a cell in the soil with its legs and mouthparts and smooths the interior by pressing the sides of its body against the wall of the cell. Hellgrammites have no silk glands; consequently, there is no silk or cocoon lining the cell. After spending one to 14 days inside the cell as a prepupa, the hellgrammite sheds its exoskeleton to become a pupa. The pupal stage requires seven to 14 days after which the adult emerges and digs its way out of the cell.

Adult dobsonflies are short-lived (about three days for males and eight to 10 days for females). It is generally believed that they do not feed in nature[. ] The adults are active at night and are strongly attracted to lights. Otherwise they spend most of their time in thick vegetation near streams.

Dobsonflies are beneficial insects and should be conserved. Hellgrammites are prized as bait by fishermen (particularly for smallmouth bass) and are available for sale at bait shops in some areas. Because of the effort required to collect them, they are fairly expensive to purchase. Therefore, they may be subject to over-exploitation and their collection for sale is regulated in some states. Although, hellgrammites are great fish bait, they are rarely found in the stomachs of fish – probably because they spend most of their time under rocks where they are inaccessible.

Hellgrammites tend to be found in relatively unpolluted water. Therefore, they may have value in bio-monitoring studies (Voshell 2002). Perhaps their greatest value may be their contribution to biodiversity in their habitat as predators.

Pretty COOL! Last year, a salmonfly (aka stonefly). This year, a dobsonfly…the New River Valley is an interesting place to live!

Predation

While at market yesterday, a worm emerged from one of the squashes (hey, we follow organic growing practices…bugs come with the territory), and I got to watch my own version of National Geographic Explorer on my very table as predation in all its aggressive goriness happened before my very eyes…out of NO WHERE came a wasp (yellow jacket). He immediately found the worm. No delay. The worm was done for…

Wasp stinging the worm

Wasp stinging the worm

Wasp sucking the life juices

Wasp sucking the life juices

The wasp came and went a few times.

Worm is now headless

Worm is now headless

Worm is  chewed up

Worm is chewed up

The wasp and worm had to be flicked off my table so I could finish packing up. The worm flew into two pieces. The wasp seemed sluggish, no doubt satieted…but he found the pieces on the ground and kept at it. Wild Kingdom. Roar.