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Jun 22, 2018 9 tweets 4 min read Twitter logo Read on Twitter
Yeah, so...this is a really good question about a word we used in that last Sciarid tweet.

"Voltrons" is not a technical term, but I kind of feel like it should be.

Especially for formations like this.

Thread below, although not quite a #DeepDive.
Take a look at the insects in the original tweet from @natevanwechel and compare them to the sawflies below.

More or less, they're doing the same thing for reasons/benefits that aren't entirely clear.

Sometimes, insects will migrate in large groups from one place to another. Processionary caterpillars form a convoy, but some sawflies and Sciarids form huge groups that seem to act as a single organism.

They don't join up like slime moulds, but the idea isn't that different.
There's a number of different explanations for this, but the one I've always found the most compelling is the surface-to-volume ratio explanation.

Essentially, if you're migrating as a bunch of smaller bodies, you have more surface area exposed.

It's better to team up!
If you're a migratory formation of insects, having a large surface area is bad for a few reasons.

The most obvious one is dehydration. If you're small, water can leave your body faster...so the journey is more dangerous

There's a second, more interesting, one though

Parasites!
If you look closely at the picture above, you'll see some tiny little flies tracking that mass of sawflies.

Here's a closeup picture.

This is a Phorid fly, one which specializes on parasitizing this species of sawfly.
These flies were traveling along with the larvae, laying their eggs on whatever larvae they could access.

Here's the best picture of the flies laying eggs I could get.
These flies are only going to have access to the larvae on the outside of the group. The larvae on the inside are safe because the flies can't get to them.

The larger the group, the safer the larvae.

There's benefits to forming a large group like this, and acting as one!
So...why do I think this sort of formation should be called a "Voltron?"

Voltron also comes together to become more powerful!

Also, when I see pictures/videos like this, I always imagine the bugs saying the lines in the video below.

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More from @BugQuestions

Aug 26, 2018
Yeah, we get pictures/videos of this occasionally.

Ants don't really do 'funerals'; even the dead in their own colonies are put into a garbage dump rather unceremoniously.

There's a handful of possibilities for this behavior...
1.) They may be attempting to bury it, especially if it's on a hard surface.

Lots of ants bury large food items to protect it from scavengers, other ants, and to absorb liquid which comes out from the prey.
2.) The critter happened to fall into the colony's trash pile.

Ants put waste (dead ants, poop, shedskins, etc) into a large pile called a 'midden pile' which functions just like our landfills.

If something ended up in that pile, they could be moving stuff out of the way.
Read 4 tweets
Aug 25, 2018
I think this problem hits at the heart of the issue when it comes to Eckbom's, because it's often not about infestations.

This deserves it's own thread to describe how complicated this problem is, and how poorly understood it is.
So...first, I believe that these people are accurately describing their perceptions of medical issues.

Urban IPM Extension people can go through samples to find insects, inspect homes for infestations (bed bugs, fleas, etc), get someone to do skin scrapings for Scabies, etc.
However, after that, they need to be passed onto a doctor.

Often times, attempts at self-treatment can cause skin irritation. Pesticide poisoning can also cause crawling sensations.

Brain tumors, autoimmune diseases, even cold weather can do this as well.
Read 4 tweets
Aug 25, 2018
Scientists make their living using their brains to interpret data.

So what happens when that organ breaks, and a respected researcher becomes mentally ill?

In this week's second #DeepDive, let's explore the case of Jay Traver.

CW: Mental illness
Jay Traver was one of the early entomological pioneers. Her career centered mainly around aquatic insects, specifically mayflies.

Most of her work-which is still cited to this day-revolved around describing the lifecycles of mayflies.
In 1951, Traver published a paper where she claimed to have experienced an infestation by a mite called Dermatophagoides scheremetewskyi.

This is a mite which lives in homes, and although it causes allergic reactions, it was known at the time to not be parasitic.
Read 15 tweets
Aug 24, 2018
A new meme going around FB claims the WoodLouse Spider is a "deadly new species" wrecking havoc in the Southern US

It's a completely harmless spider, but it still has a neat story to tell.

For the first of this week's two #DeepDives, let's explore the biology of Dysdera crocata
So, for the first tweet in this series, let's put these rumors to rest with data.

There's a lot of verified bites from D. crocata in the medical literature-which is rare. One person allowed themselves to be purposely bitten multiple times.

No deaths; everyone was just fine.
D. crocata gets it's name-the woodlouse spider-from it's food.

They live in dark, moist, areas and are adapted to feeding on sow bugs...sometimes called rollie-pollies.

They use those huge mandibles to foil the isopod's defensive rolling.

Read 8 tweets
Aug 21, 2018
It is with a heavy heart that we announce that one of our colleagues, Vazrick Nazari, has been arrested for possession of child pornography.

We cannot tolerate exposing our followers to this sort of person, and have blocked him from our feed.

ottawacitizen.com/news/local-new…
We did consult him for help with moth IDs here on Twitter, and although there's no way we could have known he was doing this, we still feel the need to apologize for exposing our readers to-and let's just put it as bluntly as possible-an alleged child predator.
We try to be careful about who we consult, and let into our conversations.

Unfortunately, it's not always possible to know what's going on behind the scenes.

Needless to say, we will not be requesting any more assistance from this person.
Read 4 tweets
Aug 18, 2018
With Glyphosate being in the news due to a recent court ruling, let's take this opportunity to explore the history of pest control in this week's #DeepDive.

It's a huge and complex topic, so the best we can do is a brief overview.
It's not really known when humans started using pesticides.

The first agricultural societies began about 10,000 BCE, with several independent shifts around the world from relatively nomadic lifestyles to those tending crops.
The first records of pesticides being used is in Sumeria, where they used elemental sulfur to control crop pests.

This is largely an accident of geography; Sulfur deposits are abundant in a stretch between Mosul and Fatha...which allowed easy access.
Read 27 tweets

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