Matt:
Do I remember correctly some research on ground temperature reaching 41 degrees at some given depth as a trigger?
Shep Evans
From: Alexandra Echandi <aechandiesq@gmail.com>
To: vernalpool@yahoogroups.com
Sent: Wednesday, February 22, 2012 3:36 PM
Subject: Re: [vernalpool] Re: Early spring migration
maybe Mercury? it will be visible tonight right after sunset!
On Wed, Feb 22, 2012 at 3:19 PM, matt burne <mattburne@gmail.com> wrote:
> Good question!! As far as I know, no one knows. It's reasonable to expect
> that there are some queues beyond just temperature and frost to keep them
> from a false start in Jan or Feb thaws. Maybe that's a frost-depth thing
> in normal years. Maybe they are afraid of Orion?
>
> Matt
>
> On Wed, Feb 22, 2012 at 8:40 AM, Jessica Kagle <jessica_kagle@hotmail.com
> >wrote:
>
> > **
> >
> >
> >
> > Matt, is there no correlation between increasing daylight amounts and
> > amphibian migration? Are they strictly basing their timing on temperature
> > and frost?
> >
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> >
> >
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