LOL!! I wondered who that picture was of under Bee Pest :) I hid when they tried to get my picture to update the dictionary.
I have a friend that sells queens, and when I voiced my personal trouble in FINDING my queens, he put me to work looking through his Nuc's.. He wouldn't let me catch the queens for him, but made me find them. In the three frame Nuc's it wasn't quite as hard. In about an hour, I went from not being able to see them at all, to finding them on the frames even if someone else was holding said frame. Like anything else, it just takes practice.
If you know someone who is in the business of queens, don't be afraid to ask if you can help spot them. They have a lot of them to find in a short time. it helped me a lot!!
For a true challenge, come on over and I will let you try to spot one of the feral queens I have.. they are colored exactly like the bees that surround them. Yellow and black abdomen, so I seldom attempt to find them, but do on occasion spot them during an inspection, and I always have to wonder HOW on earth I managed it.