What the heck are these?

Does anyone know what these are???  They have invaded our yard:

I would love to know if they are harmful to the trees in our yard or harmful to my plants.

Promising growth

I'm excited about the things that are starting to change and grow in the garden!

Does anyone have experience with growing raspberries?  When will the flowers produce fruit?  Will I need to cover it with a net to keep the birds from getting it?