Yeah, the holes are huge. My dog can get his head in one, and they are traps for unwary feet. I'm darned lucky I didn't sprain or break my ankle stepping into one of those. The holes are hidden by the grass in pastures.
When I lived in Boston, my neighbor went to war with chipmunks. He didn't shoot any of them because, you know, it was against the law (and maybe not for him anyway). The most brilliant idea he had was to fill a tall bucket halfway with water, and put a bridge up to the bucket (a board) that was baited with chipmunk-friendly food. I was aghast at the thought of all those drowning chipmunks. No worries, not one single chipmunk fell in the bucket.
He had little kids, a dog, a cat ... so resorting to poison was not an option for him. He never solved the chipmunk problem.
Over at my house, we had chipmunks who lived next to the front door and next to the back door. We liked them. Once a few got into the house when I left the slider open. My dog followed them around, and they left after awhile. For a year, a shrew would come in every night about 10 pm, stay for an hour or so, and then leave. I had a Rough Collie back then, and they are herders, not hunters. All animals, except human stalkers, were safe with him.