?Bird Cherry

c.f Prunus padus

We were up early and out counting birds, this morning.
These trees are planted at the "Fit o' the Walk" where they don't do very well, at all. So much so, in fact, that I have never seen them set fruit; I'm pretty sure they're some type of Prunus, though. I don't know if they should be included as a wildflower (though they are a type of rose) but this was the only blossomy picture I took today...