World's largest bee after 38 years rediscovered on remote Indonesian island
ubbed "the flying bulldog", Wallace's giant bee (Magachile pluto) has a wingspan of a whopping six centimetres.
The giant bee has only ever documented twice before: when it was first discovered by naturalist Alfred Russel Wallace in 1859, and then again in 1981.
With no sightings since, it was thought to be extinct.
While researching the bee's whereabouts, the University of Sydney's Simon Robson and his colleague Glen Chilton of Saint Mary's University in Canada heard of a US-based photographer and a young entomologist who were planning to go search for it.
The four insect detectives decided to pool their resources and expertise.
Early one morning in January they met in Jakarta, and scrambled for a connecting flight to the Moluccas Islands to try their luck.
"It was basically four people who had a long-term interest in this bee just got together and said, 'let's spend the money, we're going to go see if we can find it'," Dr Robson said.
The group searched through forest on an island in north-east Indonesia for five days in stifling tropical heat, checking termite nest after termite nest for signs of the bee.
The female bees burrow their way into termite nests to lay their eggs, leaving behind a tell-tale hole big enough to squeeze through.
"We were in the forest and it was late in the afternoon, and we were wandering off for a late lunch and one of us spotted a termite mound," Dr Robson said.
"One of us climbed up the tree and the hole was lined with resin and that was very encouraging, and we finally got the torch in there and we could see the bee in there looking out at us."
From there, they put a plastic tube over the hole in the termite nest and coaxed the bee out with a blade of grass to be photographed before releasing it.
The bee collects nectar to feed to its young, but doesn't produce honey like the European honeybee or some Australian natives.
And also unlike the European honeybee, it doesn't die after stinging, according to Dr Robson.
"This bee could probably sting you quite happily and then sting you again, it wouldn't kill it," he said.
Wallace's giant bee also has a large set of pincers called mandibles on its head, which Dr Robson said could probably "do a bit of damage".
Because the bee has only been seen a handful of times, scientists still don't know much about it. ■