[DallasBiff]

Bees like seeing yellow, blue and purple, because flowers with lots of pollen are often those colors.

I'm not an entymologist(sic), but maybe the bees smell the pollen, and again I'm not an insect expert.

[lee martell]

That’s another factor.
I’m trying to learn about bees so I can get my vegetables pollinated this year. Last year, not much harvest.

[Pocketdoor]

I don’t think they smell the pollen. They send out scout bees and when one finds a good source it returns to the hive and does a little dance telling other bees where to go. Quite amazing. They will range 5 miles maybe more.

[Tymesup]

IIRC, bees use sight when choosing which flowers to land on while solving the traveling salesman problem, over and over again. Having watched them for hours, it was never apparent how they chose their routes. Different bees chose different routes. I imagine that the bees and the plants co-evolved to help each other.