The Great Sunflower Project

I am out everyday, but Sunday observing my Lemon Queens. I have tons and tons of blooms coming on, but the bees are becoming more and more sparse. How long do you want me to keep recording after I quit seeing bees? Do you want me to continue and marking 'no bees' on my observation pages until the flowers die? or how do you want to work that? I am happy to do whatever you need me to on the observing.

Thanks