New uses for an old familiar

My halfling wizard/rogue has had her hummingbird (Mater) familiar for years now. I often tend to forget about the little buzzer during game play, but I recently realized a new use for the bird. A cleric in our party can cast Silence on Mater, and then the wizard can send the hummingbird to fly around the heads of our spellcasting enemies. Not only does this silence those casters, but the silence effect travels with them via Mater. The enemy spellcasters are often confounded by the source of the silence, especially if they can determine the silence is not applied directly to themselves.