Buzzing yes, Stinging no
John Ascher is an entomologist in New York. He's one of the leading experts on bees, but the blue-green buzzer he collected in Brooklyn's Prospect Park in 2010 puzzled him. It took until 2012 to nail it down and get a formal description ready of the newest domestic species of bee - one of the "sweat bees" that "uses humans as a salt lick." Sounds a little gross, but these are basically harmless critters, and a new discovery within a major urban areas is always intriguing.