In what specific ways do "People tend to love Monarchs to death," as Altizer says with substantial negative effects on the survival and reproduction of the species on a continental scale (migratory monarchs occur in all 48 mainland States of the USA)? In what specific ways is it conceivable that humans could "disrupt the butterflies' migration" via making them unhealthy on a continental scale?
I am not aware of any case history where humans have ever intentionally or inadvertently suppressed the population of a migratory insect (e.g. locusts, armyworms) within it's natural geographical range by spreading around it's own naturally occurring diseases and parasites. Paul Cherubini El Dorado, Calif.
