Originally Posted by Steve Baker
In Fools Paradise, Gierach did talk about the timing of plants and flowers in relation to hatches, and his point was that in different parts of the country might the dates might vary due to latitude and elevation, but the relationships would be consistent.
bingo, knew I read that somewhere. I think he said something about wearing a red ribbon around his hat to attract hummingbirds cause he knew when they started migrating back that a particular fly should start emerging as well. Interesting approach. Different than the usual temperature judgement or dark bwo weather approach.