Nature in our back yard: Robins

It's not that unusual to see a pair of robins in our yard, or some parents with young ones; but today we have several males all pecking and flying back and forth past our large basement window.  I think it has something to do with the fact that the snow's finally retreating and we have some patches of bare grass.
And then I found this online:

Q. Which returns first: males or females?

A. Male robins arrive on the breeding grounds a few days to two weeks before the females return. You can tell male robins because their head and tail feathers are very dark black and bright orange in comparison to those of the female. When the first females arrive later, you'll notice their plummage appears faded and drab in comparison to that of the males. 

So I guess you would call it a robin stag party?