While most of us believe we have missed spring, the robins didn’t.
I have a pair of robins gleaning worms, etc., from our lawn to feed their young.
When did they have time to build and nest? They did manage somehow and I have had concerned calls about empty blue egg shells being found on lawns.
Not to panic, most birds dump their empty shells away from the nest area so that predators cant locate the it.
The robins’ blue shells are just more noticeable. Starlings also have larger and paler blue eggs.
D. Murray Mackay