OP
ELizabeth[buzz]
New Bee
Well, for starters the diversity of forage available in your local area, and depending on where you are possibly an indication of foraging range - if there's oilseed rape 3km away and you see them coming in with that pollen, then you can demonstrate that they're travelling at least that far. Or if you know certain flowers are in bloom but you don't have that pollen coming in, it could indicate that the bees aren't foraging those plants, which leads to the question of why not?
A pollen trap on the hive might help & be easier than constant observation.
Alright that sounds like a very good idea! Im going to get started on my project as soon as possible