My two pecan trees are coating everything with a layer of pollen. The floor of my gazebo is yellow. If I sweep it up and place it in a bowl near the birdbath the bees use as a water source, would they be likely to take it to the hives and would it be a particularly good source of protein for the bees?
No, Pecan is wind pollinated like Oak trees the pollen in low in protein and of low value to the bees.