The world's biggest bee has been found after it was thought that the species had become extinct as there has not been a sighting since 1981.
He described the female-about as long as an adult human's thumb, and four times larger than a European honeybee-as a "large, black, wasp-like insect, with vast jaws like a stag beetle".
On Thursday, they released photographs and video of a nest and its queen, saying their find was the "holy grail" of species discoveries.
A documentary film about Wallace's giant bee is now in production.
"To actually see how attractive and big the species is in life, to hear the sound of its giant wings. was just incredible", said Clay Bolt, a specialist bee photographer who snapped the enormous insect. The means it's 4 times larger than the European Honeybee.
"To see how handsome and big the species is in real life, to hear the sound of its giant wings thrumming as it flew past my head, was just incredible".
The bee was first discovered in 1858 by naturalist Alfred Russell Wallace, who developed the theory of evolution by natural selection at the same time as Charles Darwin.
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Last year, a Wallace's giant bee specimen sold for more than $9,000 on eBay.
As for the other discovered species, clips from the trip and rediscovery of the Wallace's giant bee are now being compiled and produced into a documentary film: "In Search of the Giant Bee".
In January 2019, a group retraced Wallace's steps and journeyed to Indonesia to see if they could find the bee.
Global Wildlife Conservation (GWC) researchers spent five days in the North Moluccas, where they observed dozens of termite mounds-home to the female giant bee.
The newly rediscovered Wallace's Giant Bee, also called "Raja ofu", or king of bees, has gained widespread media attention.
As has been the case with other historic perceptions about bees, the king bee turned out to be a queen: the females are far larger than the males, which measure less than one inch in length.
"My dream is to now use this rediscovery to elevate this bee to a symbol of conservation in this part of Indonesia", nature photographer Clay Bolt's statement reads within the Friday release. Messer's observations of its behaviors - like how it used its giant jaws to gather resin and wood for its nests - provided some insight, but still, the bee remained generally elusive.