Hello, I have a question. A few days ago, a female American Robin made her nest on our grape shelf. I was glad that a bird came nesting in our back yard. She was busy making her for the following days. But the day before yesterday, she didn't come making her nest. I wondered why. I thought she was just taking a break. Unfortunately, she didn't come, neither today. I want to know the reason why she didn't come these days... Thank you very much.