The photo of the dry fly looks like the hackle has been trimmed to suit either the tier or the hook. I have always understood that trimming hackle to achieve proper size (1-1/2 X hook gap ) was a no-no. My early tying teachers beat this into me for so long that I still , 45 years later, just don't do it. What I have done, many times, is to snip out a V cut on the bottom side of the hook, getting rid of the hackle fibers that make them look too long. I do this on Elk Hair Caddis so the fly will float lower on the surface film. Sometimes, I just don't put any hackle on the EHC, but somehow, a dry fly without hackle just doesn't seem right. But then again, that hackle with the squared off tips just doesn't look right either