Strange Red-Bellied Behavior

In the course of recent weekends I have noticed a peculiar habit formed by one of the area Red Bellied Woodpeckers.  I expect to see these characters working suet and peanuts.  But this one has a serious fondness for sunflower seeds.  Or at least, it grabs seeds and makes a lot of trips.  It may be that the bird is caching seed someplace.  Strange stuff: I have never seen this sort of thing before.  I can't say the RBW is taking a lot of seed but it is having an impact during the times I have watched: seemingly dozens of trips.  I am going to need to research this new and interesting behavior!