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Re: [OM] IMG: Monarch Butterflies

Subject: Re: [OM] IMG: Monarch Butterflies
From: "Brian Swale" <bj@xxxxxxxxxxxxxxx>
Date: Mon, 15 Apr 2013 02:20:39 +1200
Tina wrote
> PESO:
> 
> I heard a report on NPR that the Monarch butterfly population decreased
> 60% this year because all of their milkweed is being killed by the
> stronger herbicides now in use for GMO crops.
> 
> This is what they looked like in Mexico in 2004:
> 
> http://www.pbase.com/tinamanley/image/149661128/original

Monarch butterflies were self-introduced into New Zealand about 1870, and 
their success depended on the various milkweed plants that were 
introduced by settlers. ( Gibbs G W  "New Zealand Butterflies" 1980 
ISBN 0 00 216955 X) 

Since then they seem to have developed several local seasonal hibernation 
patterns / locations

Brian Swale
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