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Why Nectaring Intensely?
Monarchs are one of the few organisms that gain in mass as they migrate — from 60 milligrams in September, to over 100 mg in October, to about 140 mg when they reach Mexico in November.

"A male was feeding heavily for about 3 hours on my Joe Pye Weed."
Judy Front    Oak Park, Michigan   August 22, 2014

Monarch Butterfly: Why Nectaring Intensely?
Judy Front

Monarch nectaring on blazing star

Building Fat Reserves