Honeybee can safely land at virtually any angel without problems,     how do they do it.. 

  Safe landing requires that honeybees reduces it's approach speed to nearly zero before contact.... . One logical way to do this would be to measure two factors _ flight speed and the distance to the target

    However, the method would be difficult for most insect because they have close set, fixed focused eyes,that cannot directly measure distance . 

    The vision of honeybees Is very different from that of humans who use binocular vision.  Honeybee seems to use the simple fact that an object appears to get bigger as they approach it,  the closer they get to an object , the faster it seems to increase in size .....

         Experience indicate that honeybee decreases it's flight speed so that the rate  of appearance enlargment in an object remain constant. By the time the honeybee reaches it's target, its speed has decreases to almost zero allowing it to land safely

The generosity of this landing strategy makes it ideal of implementation in the guidance system of the fly robot.. . 

      Did the honeybee landing Startegy evolve? Or was it designed?