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