Eli and the Monarchs

Having asked the question of how the angler fish managed without it's worm for a million years while it was evolving, my grandson Eli and I got round to talking about the Miracle of the Monarchs; I'm speaking about the Monarch Butterfly.
Once numbered in their billions these beautiful insects have declined drastically in the last twenty years, mainly due to the ravages of pesticides.. Nevertheless, their winter home in Mexico is still a destination Mecca for tourists.
They hang in their millions in the high altitude pine forests, coloring the dark green foliage with massive splotches of orange and red.
But the question remains, "How do they find their way to their winter home?"
This brightly colored insect will lay eggs in Canada that hatch into caterpillars, which in turn spin a chrysalis, which then turns to mush. Then, inside the mush appears a brain less then the size of pin-head, which eventually belongs to a newly born monarch butterfly. Inside this pin-head brain is a system that guides the butterfly 2000 miles back to Mexico within a few yards of where it's mother began her journey a year or so before.
FIGURE THAT OUT,  when, last week, my Garmin G.P.S in my car sent me the wrong way on a 60 mile journey to Toronto.

Jubilate.

Ian