Actually, tropical or sub-tropical species introduced into Michigan do have
one "natural enemy" - cold!  I think it is unlikely that any such species
would survive the first Michigan winter it encountered.  On the other hand -
the fact you were able to collect three of them suggests that there is at
least a localized population of the species (very unlikely that someone
tossed three specimens into a pond and you found the same three).  Any
thoughts on this from our ecologically erudite members?

> ----------
> From:         Conchologists List on behalf of Linda Bush
> Reply To:     Conchologists List
> Sent:         Thursday, September 8, 2005 7:37 AM
> To:   [log in to unmask]
> Subject:      Thanks!
>
> Hi, All!
>
> Two people gave me an i.d. for my fresh water snail = Viviparus
> georgianus.  Thanks Kevin and the person whose e-mail I accidentally
> cancelled.  Though I failed to get your image, Kevin, I found a photograph
> on the internet after I had the name.  This is definitely the right i.d.
>
> Interestingly, the finding of this species in Southern Michigan seems to
> be a introduction from Florida and some adjscent areas.  How many times
> have we seen introduction of species, but many from foreign areas, with no
> natural enemies.  I hope my snail does not fall into the "dangerous"
> category.
>
> Thanks again,
> Linda
>
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