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Chicago, IL Ant ID Request, 10/14/25


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#1 Offline Mr.Teddy - Posted Yesterday, 12:20 PM

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First post, apologies if there are missing elements. I am a STEM teacher attempting to raise ants with my class for a little hands-on learning. Thank you in advance for your expertise (and patience with my amateurishness)! 

 

1. Location of collection: Edgewater, in Chicago, IL. 

2. Date of collection: 9/9/2025.

3. Habitat of collection: A grassy patch of otherwise dry, almost dusty, compacted soil near the beach (unable to pull up the technical terms).

4. Length: Approx. 8mm. Could not remove from enclosure for fear of disturbing.

5. Coloration, hue, pattern and texture: Chocolate brown, with velvety, almost iridescent gaster with golden "ridges" between plates. No hair that I can identify. 

6. Distinguishing characteristics: No petiole nodes or spines/bumps that I can identify, waist seems to be very short, almost non-existent. Unsure of antennal segments.

7. Anything else distinctive: Nothing else distinctive, cooperative with her workers, seems to have a more active, less sedentary role.

8. Nest description: Small hole flush with the ground, no mounds, dusty grey, compacted soil near the beach, slightly gravelly. 

9. Nuptial flight time and date: Did not witness.

 

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  • rptraut likes this

#2 Offline cooIboyJ - Posted Yesterday, 12:30 PM

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Looks like Lasius neoniger or Lasius americanus. Both are very common and easy to keep species.


  • Stubyvast likes this

The ants go marching.

 

Currently keeping:

Brachymyrmex patagonicus

Nylanderia vividula

Forelius pruinosus


#3 Offline Mr.Teddy - Posted Yesterday, 12:48 PM

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Thank you very much!!!


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#4 Offline Stubyvast - Posted Yesterday, 6:15 PM

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Yup, I'd second that. Lasius americanus would be my guess, just based on the species I've kept.


Manica invidia (1 queen,  ~200 workers)

Manica invidia (1 colonies, 1 queens plus 3 workers)

Lasius niger (single queen, ~200 workers - naturalistic, predatory set-up)

Lasius americanus (1 colony, ~10 workers)

Tetramorium immigrans (3 colonies, 3 queens, ~ five workers each | 1 colony, 1 queen, ~1200 workers)

Formica aserva (aserva queen, ~15  â€‹Formica neorufibarbis workers)

 

"And God made...everything that creeps on the ground according to its kind. 

And God saw that it was good." - Genesis 1:25

 





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