Picture shows a bee on a flower, undated. The combination of honey bees and mason bees as pollinators yields a much bigger harvest than with only one species. (Julia Osterman, NewsX/Bee)
A honey bee visits a white sage plant, undated. Researchers have shown that pollination by honey bees, which are not native to the Americas, produces offspring of considerably inferior quality (lower fitness) than offspring resulting from native pollinators. (Dillon Travis, NewsX/Bee)
Gail MacInnis poses in undated photo. A study by researchers from Concordia University in Montreal, Quebec revealed that the number of solitary bees was decreasing wherever there were many domesticated honeybees. (Concordia University, NewsX/Bee)
Picture shows propolis in a beehive, undated. Propolis is a resin that bees create which contains a mixture of bee saliva, beeswax and substances from plants. (NewsX/Bee)