Now, the Callibaetis is the sexiest mayfly of all in my opinion. Its striking mottled wings, good (highly visible) size, bankers hatch hours, and ability to bring quality trout to the surface on stillwaters are what make it so appealing. In the western US, it is by far the most important stillwater mayfly.
And so, when I see a bunch of Callibaetis mayflies on the surface, and I see trout feeding aggressively near the surface, I tend to scramble for my flybox and start deciding which of the numerous Callibaetis imitations that I should tie on. Often, seeing what I have explained above does in fact mean the trout are eating Callibaetis. But not when there is an invisible, underwater blizzard of chironomid pupae.
The trap was set. And we fell for it. After 20 or 30 minutes of fishing among numerous (extremely numerous, actually) feeding fish, using multiple Callibaetis tactics (slow intermediate and nymph, floating line and nymphs, dry fly and emerger on top, dry fly with emerging nymph dropper, etc), we only had a couple of hookups to show for our effort. I knew we had been duped by the chironomids yet again. Small, a bit ugly, and decidedly un-sexy insects – their abundance was essentially overwhelming the beautiful Callibaetis in the eyes of the trout. And still, another 20 minutes went by before I switched to chironomid pupa tactics. Each cast that wasn’t intercepted by a trout was punctuated by a comment along the lines of, “they must be on the chironomids”. I didn’t want to believe that the trout would ignore all those beautiful mayflies.
But they did just that. The rest of this story is fairly boring. We finally switched to chironomid tactics, dialed in the pattern and depths, and caught fish after fish until we had to get back to town. Fooled, but not totally foiled, we still had a great time, shared some good laughs, and reminded ourselves of the Callibaetis and chironomid trap. Maybe we will actually remember it next time, or at least acknowledge it as we are tying on our Callibaetis imitations.
Take Care and Fish On,