These Western Velvety Tree Ants were all over this Carob Tree as usual. These ones were also crawling over the remains of a Western Hardwood Sulphur Shelf mushroom.

On: https://www.inaturalist.org/observations/146190296

I found this Turkestan Cockroach nymph on a buried and decomposing mushroom cap, presumably eating it.

When I picked the mushroom and moved its veil, the cockroach ran out and fell onto the ground, startling me.

On: https://www.inaturalist.org/observations/138477681

This Rove Beetle (top middle of pic 1) was on a piece of a Western Hardwood Shelf mushroom that had fallen to the ground. The mushroom was previously attached to the trunk of a watered Carob Tree. I just noticed its presence in the photos today.

Duplicated from https://www.inaturalist.org/observations/138481768

I found this Mite walking on a piece of a Western Hardwood Shelf mushroom that had fallen to the ground. The mushroom had been on the trunk of a watered Carob Tree.

The Rove Beetle observation: https://www.inaturalist.org/observations/198614129

These maggots were inside a mushroom, presumably eating it. A Whirligig Mite came along and started eating one of them. I was photographing the Mite and didn't see the tiny maggots at the time.

Mushroom it was on: https://www.inaturalist.org/observations/197123058

Being eaten by: https://www.inaturalist.org/observations/197123062

Other maggots in the mushroom (Sciaridae):

Photos 1-7 were edited to have a Custom White Balance in Photoshop (Photoshop's preset).
Photos 1-4 were brightened.

I found these Springtails on a mushroom in the Zanja Creek a day after it had been filled with rainwater. The mushroom was on a natural piece of wood.

Mushroom observation: https://www.inaturalist.org/observations/159779946

Most of these photos were sharpened in Photoshop. Some were brightened slightly.