Drop an ant in...and after it is seized then attempt to dig it out with a spoon. They will be the same color as the dirt and possibly tiny so make sure to inspect your catch carefully before determining that you missed.
I went to the park, and brought a container because I thought the area was good for these guys, and from looking with my friend with little light left we found 4!
They are all very cute and are digging funnels ATM.