Pollen Identification

It was a warm sunny day yesterday and the bees were bringing in lots of pollen. Can anyone help identify where this pollen comes from?

I would guess the pollen is from a tree blossom but not sure. The only trees that seem to be in bloom are the maples.





























I did see my first dandelion flower yesterday, but only one, here it is:

I also saw this crocus flower:

Here is the garlic I spoke of in my last post: