>It's February, and the occasional day reaches into the 60's and low 70's.
>This is my first Spring with established hives, and would like some advise
>on when I should first open my hives for inspection.  Books I have read say
>"a warm day in February".  What has experience taught you?
 
Whoa, 'a warm day in Feb'!! That for us is -10C  :-)  I would suggest a High
of 60F, that's what I look for here. The bees should be flying well, very
little wind, a pleasant day!! Open quickly, minimum disturbance, check for
eggs, alls well,.... for now!
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   * David Eyre          9 Progress Drive, Unit 2, *
   * The Beeworks,    Orillia, Ontario, L3V 6H1.*
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