Hans Forsberg is training local magpies to trade trash for food

Hans Forsberg has been documenting his efforts to train local crows to recycle. Crowboxes (previously) are a fun way to get local crows to bring shiny objects in exchange for food. Others have experimented with getting crows to pick up litter like cigarette butts.

He recently got them to start adding cans:

Image: YouTube / Hans Forsberg