Noticed this tower of mud balls in the middle of my lawn this morning. It’s about 4 inches high with a hole in the center. What made this?

1. The Mystery of the Mud Tower in Your Lawn

This cylindrical tower made of mud balls, with a hole in the center, is most likely the work of burrowing crayfish. These mud structures are formed when the crayfish excavate soil to create a burrow, and the tower acts as a ventilation shaft for their underground home.

2. Meet the Builders: Terrestrial Crayfish

Burrowing crayfish are the engineers behind these towers. Unlike aquatic crayfish, they live in moist, land-based environments. They dig deep burrows to stay cool and humid, and the mud chimneys they create help regulate airflow and moisture levels inside their burrow.

These nocturnal creatures are usually about 3 to 6 inches long, and the towers are constructed at the entrance of their burrows using mud balls carried up to the surface.

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My 9-year-old daughter baked 300 Easter cookies for the homeless — the next morning, a stranger showed up at our door with a briefcase full of cash. My daughter, Ashley, has always had a heart too big for her chest. Since my wife died, we’ve barely been making ends meet. We spent everything we had trying to save her from cancer. But when Easter came this year, Ashley told me she’d been saving up her own money to buy ingredients. “For the homeless,” she said. Her mom used to be one of them. She was thrown out by her parents when they found out she was pregnant with Ashley. When I met her, she had nothing — but she had the brightest smile and the sharpest mind I had ever seen. I fell in love with her. I took her and Ashley in. And from that moment on, Ashley became my daughter in every way that matters. So when Ashley said she wanted to help people like her mom once was… I didn’t stop her. For three nights straight, after school and homework, she baked. Her little hands worked nonstop. She found her mom’s old cookie recipe. She rolled every piece of dough herself. She decorated every cookie. She made three hundred cookies. On Easter, she handed them out one by one. She looked people in the eyes. She wished them a Happy Easter. Some of them smiled. Some of them cried. I stood there thinking it was the proudest moment of my life. I thought that was the end of it. The next morning, I was washing a mountain of dishes when the doorbell rang. I opened the door. An older man stood there in a worn-out suit, holding a scratched aluminum briefcase. His eyes were locked on Ashley. Before I could ask anything, he set the case down and opened it. I froze. Stacks of hundred-dollar bills — more money than I had ever seen in my life. “I saw what your daughter did yesterday,” he said, his voice shaking. “I want to give all of this to her.” My heart skipped. Then he added: “But you have to agree to ONE CONDITION.” My chest tightened. “What condition?” I asked. He stepped closer. He lowered his voice. And what he asked for in return made my blood run cold.