can't catch a bug

Willie Nelson, my cat, can't catch a bug. He springs, he leaps and he pounces but he usually misses the bug. Mostly crickets and the unknowable winged freaks that populate this desert; he misses them all. But apparently, only when I'm watching because I see bug parts littering the granite entry every day. Unless these bugs are killing each other, Willie's success exceeds my observation. I think it's the latter.