Fiona has corrected my misunderstanding. I thought we were expecting the rapture on May 21, when, in fact, we were expecting the raptor.
According to Fiona, the raptor is in two parts: on May 21, raptors lay eggs all around the world, then on October 21, the eggs hatch. This explains the revised prediction of the end of the world to October 21.
I have been looking for raptor eggs. Fiona advised me also that they are not smooth and oval like chickens' eggs. They might look like yams, she says. I found a few raptor eggs today.