Thanks @dee and @skeggley or the responses! I will have a look at them outside the hive again to see if i can discern the difference in the bees! cant wait.
That article is great and something all beekeepers should read, especially if they want to reduce the frequency of opening the hive. It might need an update though! its now 30 years old and pre-varroa etc.
One of my little gripes about beekeeping books is that they often assume that the reader is in the same location/season as them, and mention months like ‘August’, and its difficult to interpret into my local seasons. It would be great if they could say things like ‘mid Autumn’ ‘onset of Winter’ etc so it is more accessible to all readers.