Dr. Messer observed that the bees use their unusually large mandibles to scrape together balls of tree resin and wood to fortify their nests, and that they are relatively solitary animals. Dr. Robson believes they are capable of stinging, though he wasn't in a position to provide evidence.

Are Wallace bees aggressive?

Wallace's giant bee (Megachile pluto), native to the North Moluccas islands in Indonesia, went missing for 40 years. ... As Earther noted, though they might be giants—four times the size of a honeybee—these bees aren't aggressive.

What bee is most likely to sting?

Social bees and wasps that live in colonies are much more likely to sting in defense of a hive or nest than their solitary counterparts. Honey bees, yellow jackets, and paper wasps are the most common bee and wasp sting offenders in the US by far, says Schmidt.