Insect identification help

[Twig55]

Hi everyone.

I started vermicomposting about 6 months ago, and I have a new type of insect in the bin. This is an indoor bin, so potential flying nasties are a big concern. Can you help me identify them?

I thought they were probably fruit flies in their larval stage, but I found a dissected worm today, several of these things crowded around it, and blood stains on the cardboard under the (half a) worm. Naturally, I'm quite worried. Each one is about 3mm long and looks per the photos below.

If anyone can help me, it will help me decide my next move.

Thanks,
Twig.

 

[Chuck]

Hi everyone.

I started vermicomposting about 6 months ago, and I have a new type of insect in the bin. This is an indoor bin, so potential flying nasties are a big concern. Can you help me identify them?

I thought they were probably fruit flies in their larval stage, but I found a dissected worm today, several of these things crowded around it, and blood stains on the cardboard under the (half a) worm. Naturally, I'm quite worried. Each one is about 3mm long and looks per the photos below.

If anyone can help me, it will help me decide my next move.

Thanks,
Twig.

View attachment 62345View attachment 62346View attachment 62347

Could this be the culprit in larval stage?

Springtail adult and juvenile - Stock Image - C046/3344

Springtail (Proisotoma minuta) adult and juvenile. Springtails are primitive flightless arthropods, dating back some 300 million years in the fossil record. WIM VAN EGMOND/SCIENCE PHOTO LIBRARY

www.sciencephoto.com

 

[Twig55]

Could this be the culprit?

Springtail adult and juvenile - Stock Image - C046/3344

Springtail (Proisotoma minuta) adult and juvenile. Springtails are primitive flightless arthropods, dating back some 300 million years in the fossil record. WIM VAN EGMOND/SCIENCE PHOTO LIBRARY

www.sciencephoto.com

The body shape kind of looks like it, but spring tails are white/translucent, whereas the ones I have are grey. The grey ones also don't seem to jump.