Traffic in plants and plant seeds

Liz Day lday at
Sat Sep 19 14:53:01 EDT 1998

> Today over 90% of the 40 largest overwintering sites for the monarch
> butterfly (a butterfly native to North America) along the California
> coast occur in ornamental/agricultural plantings of exotic eucalyptus
> trees. 

What did the monarchs use before?

Liz Day   
LDAY at 
Indianapolis, Indiana, central USA - 40 N latitude, zone 5b.

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