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Challenge Question #6

Ann Min (amin@mc.net)
Fri, 06 Mar 1998 13:05:35 +0000

We think that Monarch Butterflies have a natural instinct that triggers
them to leave Mexico. If they leave too early they could arrive and
there wouldn't be any food for them and they would die. If they leave
too late they can die of heat and not make the flight.
-- 
Ann Min
amin@mc.net