User:Dave Kennard
Appearance
I will try and add comparison photographs of flowers taken with visible light, ultraviolet light, and infrared light. Some flowers have hidden UV markings, known as nectar guides. Bees and other insects can see ultraviolet light, and may find these markings attractive.
You can find a list of images I've uploaded here: https://commons.wikimedia.org/w/index.php?title=Special:ListFiles/Dave_Kennard&ilshowall=1
For information on the equipment and technique I use to take these photos please see my Vis UV IR Flower Photography Guide