I don't mow my lawn often. So, I finally got off my duff, yesterday. As soon as I mowed the 6 +inch high grass, a robin flew down and started hopping around. I figured it was eating seeds or bugs. Later, I noticed I had robins hopping around my yard. They weren't eating or pecking-just hopping around. They hop about 6 or 7 times, stop look around and hop. That was at 3PM now, it's 8 PM and robins are still hopping around my yard. Later, at 5 AM, they were still hopping around my yard. None are eating anything-just hopping????? They hopped over every square inch of my lawn. Google doesn't seem to have an answer.