Robins with two nests
We have a roof over our deck and a robin built several nests, which I understand is common. However, they laid eggs in two of the nests (two in each). They definitely belong to the same robins because I've seen her hop from one nest to the other. I didn't see anything online about why she would've done this. Any thoughts?
Frederick County Maryland
We are not familiar with this bird behavior, but we are not bird experts. We'd recommend that you contact your local Audubon Society or wild bird store/center.