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Photo#387110
Tons of little grey bugs

Tons of little grey bugs
Shenandoah National Park, Virginia, USA
March 13, 2010
I truly have no idea what these are. Hundreds of small grey bugs scuttling all over the rocks. They seemed fond of the lichens. A body type similar to wood lice I suppose. If I had to guess on size I would say they were 3mm.

Moved

Hypogastruridae ...
if they jump away when disturbed, else Neanuridae.

 
I did not witness any sort of
I did not witness any sort of jumping behavior but the most disturbance I caused was placing my camera extremely close to them. Do you think that qualifies as Neanuridae?

 
Not necessarily
You have to poke them gently with a straw to test if they jump away to escape from the straw.
Was the rock with lichens near to (salt) water?

 
The rock was on the mountain
The rock was on the mountain side at Shenandoah National Park. A rather high elevation and far from water.

 
Let us keep it Hypogastruridae then

 
Thanks for the info!
Thanks for the info!

Moved
Moved from ID Request.

Springtails of some kind.
In the Guide here. They are among the most abundant of arthropods, but comparatively few people are even aware that they exist.

 
My first time seeing springta
My first time seeing springtails was in the DVD Planet Earth. I never knew this was a part of the life cycle.

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