Oh, but but. The now-defunct Linnean classification pulveratores (Latin pulvereus dusty + -ator, pl) comprised birds so named for their habit of rolling around in the dust to dislodge little bugs stuck in their feathers. Pulveratricious carries 'dust-colored, 'dust-covered,' etc. specifically through meaning 'like birds that roll themselves in dust.'
I take great pleasure in being able to slip 'bird-like by association' into any one-word description!