If they are undisturbed they will all leave within a very few hours of one another.
Robins typically fledge (leave the nest) 14 days after hatching.
In the early spring
13-14 days
yes possibly
I HAVE A NEST IN MY BALCONI WITH 4 HASH EGGS
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Everything tells me that robins lay blue eggs but a robin has nested in my garden, laid six eggs and they are all white
They lay their eggs later in the day, one egg a day, up to four eggs. The season the ones I have known lay their eggs is usually late spring early summer.
There are several species of birds other than robins that lay blue eggs. Bluebirds lay blue eggs, as well as starlings and house finches.
Generally songbirds lay eggs that are blue and have brown specs. It may have been a younger bird that produced small eggs. Hummingbirds generally produce eggs the size of jelly beans, but are white.
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Michigan birds that lay white eggs could be an American Robin, American Crow, Bald Eagle, etc.
The first to come to mind is the Robin.
Robin is a bird that has blue eggs. The eastern bluebird, as well.
The color of a female robin that I am aware of is, red and blue. Blue robins lay light blue eggs.