Last couple years have noticed tunnels in soil. Tunnels not from small animals (squirrels, moles, gophers etc.). Have had small ant problems in last couple years also, so was assuming it was ants. Recently saw a small bee or fly burrowing, so wondering if it's bees instead of ants. No bee swarms, no ants present at this time. How can I determine which? If bees do I treat or leave alone? If ants what to use to treat?