More then likely, we had one drop by for about half the day for close to a week, new egg with each visit. She then stayed with them for 5-6days all the time.
Two nights ago a racoon scared her off, and over the next day and a bit was back at least twice for the eggs
I saw a couple of maillards on a grassy median outside a retirement home and mental health social housing building. It was 10pm and dark out. I'm guessing there were eggs there, after reading this thread? No water anywhere close by for swimming.
