Wow. Every once in a while I am shocked to see a photo score so much lower than I scored it. The funny thing is that I'm fairly color blind and didn't even notice the yellows other commenters point out. Still looks b/w to me :)
Still, despite the DMNCs, this is a lovely photo and I hope you keep entering shots of this quality in the future.
I know that the mind can fill in the blanks sometimes when it comes to missing information (like color in a black and white picture) but it definitely looks like there are shades of yellow in that butterfly's wings.
Description of challenge: "The final photo MUST be in black and white (and the grays in between)."
I've gotta vote you lower because of the color. Bummer... I'm sorry. :(