That looks very much like a rodent food stash (likely from mice).
Here’s why:
The small round pieces look like millet or birdseed grains.
It appears to be clumped together with grease or saliva, which rodents use when packing or caching food.
I can see what looks like hair/fur fibers embedded in it.
It was found under a shelf — a common hiding/storage spot for mice.
Mice often collect food (especially birdseed, pet food, or grain-based rodent bait) and stash it in hidden areas. Over time, moisture, droppings, urine, and dust can cause it to turn into a sticky, compact mass like this.
It could also possibly be:
A chunk of rodent bait block (some are grain-based and sticky)
A bird suet/seed ball that was dragged indoors
A food-based item that was chewed up and stored
What You Should Do
Wear gloves when handling it.
Check the area for:
Small black droppings (rice-sized)
Chew marks
Shredded paper/insulation (nesting material)
Clean the area with disinfectant (avoid sweeping dry droppings—use damp paper towels).
Consider setting snap traps or contacting pest control if you see additional signs.
If you’d like, I can also help you figure out whether you likely have an active mouse problem based on what else you’re seeing in the house.
