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In Photoshop :D duuhhhh
I think butterflies don't come to those flowers. A fly will have to do.

You go to Image -> Adjustment -> Hue/saturation and then chose the colour you want to remove and desaturate it :p. I am pretty sure there are other ways too, but this one is the fastest for me. I also found a cool online editor to do it, but I forgot the name now

I know how to isolate colors, i am pretty good with photoshop. I was about to ask, before i saw it was done with color splash :) But thank you for explanation. I am sure somebody will find it very useful :) As for the butterflies, do these flowers smell so bad? :)

Grr pulling my leg like that!
I think the butterflies don't like to bother with such little things ;)

My bad. Sorry :) I want you to feel good :) Nobody want to bother with small things ... lol

Hahaha :D