Re: Bumblebee nest material
I collected some wads of dryer lint from when we dry the cotton towels and blankets and wool stuff (without fabric softener). Looks a lot like mouse nest fluff, and has no smell I can discern. My cat is shedding, so I'm also collecting her fur from the brush. And I'll let it all air out before I put it in the boxes.
Next time I go to the big pet store for cat food, I'm going to bring a zip lock bag and ask for a few handfuls of well used mouse tank bedding shavings.
The little bee returns with evening's gloom,
To join her comrades in the braided hive... -Tennyson