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Ant I.D Portland OR, USA (2018)


Best Answer LC3 , May 16 2018 - 9:21 PM

This appears to be C. modoc although it’s a rather small specimen. In the newer images though it looks a bit starved. Go to the full post


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19 replies to this topic

#1 Offline punsandglory - Posted May 13 2018 - 9:41 PM

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Collected: May 13, 2018, in my backyard (Portland OR) (suburban)

Length: roughly 1.3 cm

Description: Black with 4 rings around it's abdomen, has one petiole.

 

I don't know where the nest is or when it flew, and sorry for the bad pictures, it refused to stay still.

 

https://drive.google...4ieKj_PQ3m6gXGH

 



#2 Offline super_oil - Posted May 13 2018 - 10:02 PM

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Most likely Camponotus laevigatus, could also be Camponotus pennsylvanicus.


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#3 Offline Mortamir - Posted May 14 2018 - 5:52 AM

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Is the thorax dark red? Kinda looks like it from the pics.
If yes then possible C. novaeboracensis.

LC3 will probably chime in later.🐰

Generally C. laevigatus is from a high altitude.

Meow

#4 Offline Miles - Posted May 14 2018 - 6:24 AM

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Camponotus pennsylvanicus does not occur in Oregon. Having lived near Portland, I think that this is likely a dark variant of Camponotus vicinus. It may also be the western black carpenter ant, Camponotus modoc or as previously suggested, Camponotus laevigatus. If it's not C. vicinus, my best guess would be C. laevigatus due to morphological appearance. More pictures in better light will help us develop a more confident identification.


Edited by Miles, May 14 2018 - 6:27 AM.

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I study ants, environmental science, political science, and science communication at Montana State University in Bozeman. I've been keeping ants for nearly a decade and I'm passionate about conservation and public service.


#5 Offline Canadian anter - Posted May 14 2018 - 7:34 AM

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I second miles.



#6 Offline Mortamir - Posted May 14 2018 - 7:58 AM

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So you agree that we all have no idea what it is?

LoL.

Ya better pics if you can buddy.
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#7 Offline LC3 - Posted May 14 2018 - 8:53 AM

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I think the size would point to C. vicinus If I’m not mistaken.
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#8 Offline punsandglory - Posted May 14 2018 - 9:15 AM

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I'll take some more pictures when I get home, maybe it will have calmed down a little...

I also captured a second one that's almost identical except for the fact that it's bigger and was hurt when I captured it.

I don't know if it really matters but we live at an elevation of roughly 300 feet. 



#9 Offline nurbs - Posted May 14 2018 - 1:13 PM

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Pretty sure it's not a black C. vicinus. The first top down image shows the width of the head, which is wider than the thorax. Vicinus head is usually longer than it is wide, unless there is an OR variety of a black C. vicinus that I'm not aware of.

 

If you get a macro closeup shot of the head, look at the base of the scapes. On C. vicinus it is flattened, like this image here.

 

fqu9XY4l.jpg

 

Need better lit images! But this is most likely C. modoc or C. laevigatus. If the hairs are white, it is C. laevigatus. If the hairs are brown/golden, that would be C. modoc

 

Laevigatus, Modoc, Vicinus, that that order. Notice head proportions:

 

Xn9xhwal.jpg


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#10 Offline Mortamir - Posted May 14 2018 - 1:27 PM

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Well if you look at the pictures you can see this ant is 8 mm not the 1.5 cm stated above.

8 mm C.laevigatus queen? Queens generally start at 13 mm and C. Modoc as well I believe.

So let's start over.

#11 Offline nurbs - Posted May 14 2018 - 1:41 PM

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Sorry, am I missing an image? (another reason to please embed your shots) Which picture are you seeing where it shows 8mm?

 

Well if you look at the pictures you can see this ant is 8 mm not the 1.5 cm stated above.

8 mm C.laevigatus queen? Queens generally start at 13 mm and C. Modoc as well I believe.

So let's start over.


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#12 Offline Mortamir - Posted May 14 2018 - 1:58 PM

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Dang the pics are gone. He said he will try for better ones, maybe he is working on it.

#13 Offline nurbs - Posted May 14 2018 - 2:31 PM

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Dang the pics are gone. He said he will try for better ones, maybe he is working on it.

 

What? They are still up. Here, I just embedded them. Where are you seeing 8mm? 

 

U0iKQQ6l.jpg

 

4W0J1XBl.jpg

 

USMREUdl.jpg

 

RoFpMAfl.jpg

 

hC1EJdwl.jpg


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#14 Offline Mortamir - Posted May 14 2018 - 3:53 PM

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Wow, those aren't the pics I saw earlier when I clicked the link. 😭
Ya its pretty shinny.

#15 Offline punsandglory - Posted May 15 2018 - 8:46 PM

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ooooh, I know what you saw. I used that folder previously for a much smaller queen, C. Nearcticus, and it must have shown you those for some reason. Working on the pictures atm.

 

edit: I always forget how weird that tongue sticking out emoji is.


Edited by punsandglory, May 15 2018 - 9:46 PM.


#16 Offline punsandglory - Posted May 15 2018 - 10:14 PM

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https://drive.google...4ieKj_PQ3m6gXGH

more pictures



#17 Offline sericultivist - Posted May 16 2018 - 7:14 PM

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Are the legs reddish? If so, the fact that the stripes on the gaster alternate between shiny and matte would mean it's Camponotus modoc. I remember seeing a ton of modoc last time I was up near Portland.



#18 Offline punsandglory - Posted May 16 2018 - 8:30 PM

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The old pictures showed the legs as black, but the newer closer(ish) ones do show them as red.



#19 Offline LC3 - Posted May 16 2018 - 9:21 PM   Best Answer

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This appears to be C. modoc although it’s a rather small specimen. In the newer images though it looks a bit starved.

Colonies

Spoiler

 

 


#20 Offline punsandglory - Posted May 16 2018 - 9:53 PM

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Yikes! I'll make sure to feed it.






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