Once the snow melts, Canada’s bee population will be back in business pollinating, making honey and keeping busy doing bee things. And for at least two urban bee species, that means making nests out of plastic waste. A new study by a graduate and a scientist at the University of Guelph reveals that some bees use bits of plastic bags and plastic building materials to construct their nests. It’s an important discovery because it shows bees’ resourcefulness and flexibility in adapting to a human-dominated world, says lead author Scott MacIvor, a doctoral student at York University and a 2008 University of Guelph graduate. Andrew Moore, supervisor of analytical microscopy in the University of Guelph’s laboratory services department, says the plastic materials had been gathered by the bees and then chewed up and spit out like gum to form something new that they could use.