Not sufficient to describe that picture. It would have to be explained to me in laymen terms. If you draw vertical line to right of center hole,(imagining my hive), just where the green and yellow meet, condensation, Yes ? Or perhaps rather ?
p.s. In rereading posts, I think the tone is......not as I intend, perhaps because I hunt and peck ? And the ? is a pain ? Please add on my behalf in future should I omit :)
p.s.s Also I think the.....manner of speech, from all these old books is creeping on me :)
p.s.s.s. Occurred to me another way to ask ? I don't know what that pic is, I googled winter cluster, or if I'm seeing it wrong ? I can see my hive. Red, B's, yellow, thermocline?/thermal layer ? protecting Apis from green/blue ?