The Bumblebee story is NOT an urban-legend.
Einstein was a mathematician that later got into physics.
It actually is a myth.
“The rumor probably started in the 1930s with students of the noted aerodynamicist Ludwig Prandtl at Göttingen,” she said. “That was a time when we were just beginning to think we understood aerodynamic principles, as applied to fixed-wing aircraft, but scientists recognized their limitations in applying the principles to the birds and insects and other creatures in the natural world.
“I’m sure no one, including the bees, seriously doubted that insects can fly,” she said. “Now we’re beginning to understand why.”
http://www.news.cornell.edu/chronicle/00/3.30.00/insect_flight.html