I'm assuming that the photo was taken from an aircraft (ones zoomed out further are from satalite I guess (clouds appear and disappear as you zoom in and out)) so the bug could have physically been there.
Given that the images are built by joining a whole heap of images you might not be able to tell how big the bug should show up.
BUT
I don't know if I understand cameras all that well but looking at it the bug is in pretty clear focus but the ground surrounding the bug is also in focus (well no different to surrounding photos). As I understood it cameras would have a great deal of difficulty focusing on an extreme macro (the bug) and the distance to the ground at the same time.
therefore is someone at google having a joke?
or did I just think about it to much