Joe Biden Brushes Off Cicada from Neck, Press Forced to Grapple Too

President Biden kept his cool while having every right in the world to bug out ... this as a creepy-crawler tried making itself at home smack dab on his head!

46 was at Joint Base Andrews Wednesday AM ahead of his international trip to Europe -- where he's slated to meet with other world leaders, including Vladimir Putin -- and before takeoff ... the guy had to play defense against a freakin' cicada, brushing it off his neck.

The gross-out moment was caught on camera as JB talked to one of the men in uniform -- as was Biden's grossed-out face after he flicked the little bastard onto the ground ... where it belongs.

Joe trotted over to the press afterward and confirmed ... cicadas were around, and that he'd just taken care of one personally. His warning did NOT go unheeded -- as the folks following him around had to deal as well. Reports say the press plane was chock-full of cicadas.

Apparently, a swarm of the insects found their way into the engine area of the aircraft ... and actually caused a delay Tuesday night before they could hit the skies.

These buggers are all over D.C. ... CNN's Manu Raju had to fend for himself during a live shot from Capitol Hill. He reacted a little more frantically than ol' Joey here did.