Termites in Africa make huge dirt mounds however, in the US, hornets make dirt mounds by digging in the ground and making their nests in the ground. They can be very territorail pests beware if you go near their mounds they fly around you and buzz. They are easy to kill just make sure you have a net and rock ready.
Fire ants
TheSe dirt piles are called the rotom hideout and if you beat dark rust you can go In there...
Simply because there is nothing in it. They have dirt, piles of dirt and maybe a dirt mound.
In the dirt... Usually mounds or smaller piles of soil in order to do tricks. For more of a challenge, wet dirt, mud, is popular for dirt bikers.
yes
Tailings are the dirt left after sifting out the gold, so they look like piles of dirt.
Termites would be one answer.
This probably their is a mole in your yard. They throw up dirt as they dig underground looking for things to eat.
Rivers look green because, all the dirt and grass in the river piles up.
Dogs, moles, groundhogs, squirrels -and rabbits. oh yeah -lizards,too.
Which insect makes honey? The bee, of course.
a turtle lays egg on the dirt, they lay eggs and hide it below the soil
a bee that digs dirt and makes nests in dirt.