Dirt Mounds are from gophers digging underground tunnels. Snacking along the way. The pink flags are set inside the trap positioned underground marking where the traps and active tunnels are located. Checking the traps for flag movement signals gopher caught.
Oh…I gotcha now. Those traps look different than the ones over here. Are they good for moles as well? What is the brand name? That one mugshot of a gopher caught in the act (so to speak) looks like a bad character. Thanks for the clarity.