Introduction: Collect Ant Colonies Using Army Ants

Studying ants often requires collecting colonies from the field. Traditionally, the shovel has been the main tool of choice for the task. Digging entire colonies out of the ground can be terribly hard when the soil is hard or rocky or the nest spans deep into the ground. This will show you a better method of collection; how to use army ants to collect colonies of other ant species.

Why?
See http://www.insectscience.org/8.71/ for more detailed description and reasoning.

Step 1: Pick an Ant Species

Find out if army ants (subfamily: Ecitoninae) co-occur with your ant species of choice. A good resource for this is http://antweb.org/.

You will be utilizing an evacuation escape behavior of ants that are preyed upon by army ants. Not all ant species that are preyed upon by army ants have this response behavior, but several species do. With a little natural history literature research or field observations should be able to find this out.

In this demonstration we are collecting the ant Aphaenogaster cockerelli using the army ant Neivamyrmex nigrescens. Both are common to the southwestern US.

Step 2: Find the Army Ants

This is harder than it sounds.

In this example, N. nigrescens hunt primarily at night. They form dense trails appearing from seemingly nothing but a small hole in the ground (see video below). The ants we are after respond to army ant raids at night by rapidly evacuating their nests. This behavior can be triggered by releasing army ants at the targeted ants nest entrance.

In this case, army ants are encountered by randomly walking, after dusk, and scouring the desert floor for a raiding column. Once you find the army ants, collect as many (live) as you can! (see next step)



Step 3: Bring a Collection Device

You will need an efficient ant collection device.

An aspirator (pictured below) will suck up the ants from the ground and collect them into a container. You can buy an aspirator from a science supplier, but it is just as easy to make one yourself. Below is one I use built from a cordless hand vacuum. The essential components are the collection chamber (plastic food storage container) and the mesh screening over the source of suction.

An aspirator will allow you to collect large numbers of army ants when you encounter them (see step 2). Collection of the evacuating ants also necessitates an aspirator, as they will be evacuating their nests rapidly (see step 4).

Step 4: Collect Your Ants!

The Aphaenogaster ants initiate nest evacuation when army ants (N. nigrescens) are poured into the nest entrance (see video below).

Fifty army ants are enough to trigger a full evacuation. Once the army ants are poured in, Aphaenogaster workers will erupt out of their nests carrying their brood. If the queen is present she will also emerge, either on her own or being carried by a worker.

Aspirate the ants as they emerge and within 10-15 minutes you will have a complete colony, ready for observation and scientific discovery!



Step 5: Collect Responsibly!

Ants are essential to any ecosystem, be aware of the possible consequences of the modifications you are making.

Comments

author
onedenarius (author)2012-03-25

Very neat article!!! great info etc... thanks!

author
Lftndbt (author)2009-03-10

LoL, that is awesome!! I really could have used those whilst obtaining my bullant colony.

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author
Arbitror (author)Lftndbt2009-06-14

Cant' one bit from a bull ant kill a human?

author
Lftndbt (author)Arbitror2009-06-14

No it can not under normal circumstances. I have been bitten several times before, it hurts but will not kill you. If you were allergic to the venom or swallowed one and it bit your throat on the way down, that would be different. I would get to the hospital quick in that case.

author
Javin007 (author)Lftndbt2011-09-23

Ugh! After reading this, I had to google what a bull ant was. All I can say is "NO THANK YOU." I'm not going to be able to eat lunch now...

author
MozonTheGreat (author)Lftndbt2009-04-29

What a cute ant -Touches Ant- OMG Ouch!!

author
Lftndbt (author)MozonTheGreat2009-04-29

LoL, I had several escape at once. They are very intimidating indeed, the bullants head can pivot to look at you. it can see up to 3m away and tracks you as you approach... Scary!!

author
adrian_smith (author)Lftndbt2009-05-03

Yeah, those ants are frightening. I am sure they would have a different tactics for dealing with army ants, maybe intimidation...

author
kingbirdy (author)adrian_smith2010-03-03

the army ants would be like, hup, to, hup, to, ATTACK! and then the bull ants would walk up and calmly tear them all to bits.

author

yeah, pull out the m4's and cap their army asses...

author
tuckerlancaster (author)2011-02-06

Awesome! I had this idea a while back when I learned about this interesting response. However, living in Atlanta, I've never come across the the army ants necessary to test it. It's great to see that it is in fact possible. Great instructable.

author
NachoMahma (author)2009-03-11

. Great job!

author
ralegg (author)2009-03-10

Wow, very cool! I wish I was conducting some kind of a study to see this! P.S. - E.O. Wilson came to my college a few weeks ago and I got him to sign my copy of one of his books! (E.O. Wilson is probably the most well known entomologist in the U.S.)

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