Scat ID: What’s hanging around in my unfinished duck run?

[graypes]

Hi! I’m currently building a lean-to style greenhouse/run for my ducks and plants to hangout in during the michigan winter. So far I’ve only got the frame and the plastic up, and the structure has some huge gaps between it and the shed it will be attached to. I’ve still got to put up the hardware cloth/wire to keep predators out but as of today the gaps are big enough for creatures my size and smaller to enter.

This morning I found at least fifteen of these small piles in the soil. I know its probably not a predator, but I was just curious what this might be from. Could it be like a mouse or even an insect?

 

[ColtHandorf]

Looks like worm castings to me?

 

[NorthwoodsChick]

Doesn't look like mouse. The soil is pretty sandy but I second the worm theory. The zoom shots lead me to think of larger prey mammals. @ColtHandorf -way to think out of the box

 

[cmom]

If you have a camera put it up. Maybe you'll be able to find out whatever it is. Good luck...

 

[graypes]

I think you guys are right!! Never heard of worm castings but as soon as I googled I saw the match! Thanks so much!