This would be absolutely fantastic, especially because crows are social animals and learn from each-other's behavior (so your trained contingent would expand ov

This would be absolutely fantastic, especially because crows are social animals and learn from each-other's behavior (so your trained contingent would expand over time)! That said there is a small risk - if crows learn to do this second hand and don't necessarily put the buds in the box, they could start fires by dropping still lit buds that were left on concrete in the wrong, combustible, place - dry grass, paper garbage, etc.