Indigo Bunting Behavior??

I happened upon this Indigo Bunting male who was intent on plucking the pappus from this dandelion and then clutching it with his feet??

 

Is he feeding his mate? Lining the nest? He was at this for several minutes. I took a series of shots where he would pluck a seed or two and then turn (as here) to place it beneath his foot.

Done