I was talking to my friend Edna the other day and learned that the blackfly larvae are already active. Edna is one of our local Bti agents - folks who apply Bti to the streams and waterways as part of an on-going effort to control blackfly larvae. You all got to meet her last year here.
I had stopped by Edna's two days earlier to drop off photos of the beaver pond, so she could see how it had changed since last summer when she treated it (before beavers). At that point she said that the larvae they were finding were still torpid - not active. But two days later she was telling me that they (the larvae) were squirming and wriggling in massive clumps to beat the band. Treatment had begun.
Does this mean an early blackfly season? Or a longer one? Only time will tell.