That almost looks like a fruit tree in bloom. Maybe you should try the Name that Plant forum.

Prunus of some sort - ie plum, cherry or similar. Could have grown from a pit.

Bird at the feeder pooped a cherry pit.

Thanks. It hasn't shown any sign of seeds or fruit on it yet.

So far this has been identified as a cherry tree, mulberry tree, crab apple tree and someone said it looked like a white Almond tree. Interesting...

Well the flower form eliminates Mulberry and Crab Apple. Both cherry and almond are Prunus species so my suggestion still stands. It will not show fruit until the flowers are pollinated. And the seeds are the pits inside the fruit. When it leafs out perhaps you could show us a picture of a leaf or two.

This is the plant leafed out...

I just walked out to our plum tree, and walked back in with 3 ripe plums. The leaves on your tree tell me that you don't have a plum.

The leaves sure do look like a Manchu Cherry Tree.

As do the flowers.

Curious - there were no leaf pictures when I last posted. Thanks for the ID, Embothrium. Not one I've come across.

It sure looks healthy. If it is a cherry, are you considering transplanting it elsewhere in your yard? The flowers are beautiful.