Small:
* Earthworms: While they don't directly break rocks, they create tunnels and aerate the soil, which can indirectly help break down rocks over time.
* Ants: Certain ant species, like leafcutter ants, create extensive underground networks, potentially impacting small rocks and pebbles.
* Rodents: Mice, voles, and other small rodents dig burrows and can move and disrupt small stones and rocks.
Medium:
* Pocket gophers: These are famous for their digging abilities and can move rocks of considerable size.
* Ground squirrels: These creatures can burrow into loose soil and may move or dislodge smaller rocks.
Large:
* Badgers: These animals create extensive underground networks and are known to move large stones and rocks.
* Pigs: Wild pigs are notorious for their destructive digging and can overturn rocks, even large ones.
Other:
* Tree roots: Over time, the growth of tree roots can exert pressure on rocks and cause them to break down.
* Frost wedging: The expansion of water freezing in cracks within rocks can break them over time, even without any animal involvement.
It's important to note that the size and type of rock that can be broken by an animal depends on the animal's size and strength.
