Well I guess they don't throw it all out. Maybe the chunks in cracked corn do.
When they're feeding on high moisture corn from agbags, they take it home like
pollen, place it in the combs like pollen, so I assume they feed it like pollen.
First time I observed this, I thought it was some early blooming tree or shrub.
Catching a bee at the entrance for a taste, I noticed a musty, moldy smell. Got a
call that night from farmer. Sure enough, there were the bees working the corn.
Same smell and color. Rolling it up in little pink/tan loads, and taking it home
as fast as they possibly could.
 
WGMiller wrote:
 
> What do bees like about bird feeders?
>
> Since there is nothing else available, the filed bees treat the cracked corn
> like pollen, and try to bring it home to their colonies.  If you were to look
> in front of your hives, you will probably find a pile of cracked corn that the
> field bees brought home and the house bees promptly threw out.
>
> W. G. Miller
> Gaithersburg, MD