The trick is to find a photo that is not copyrighted, or has been released under a license that is compatible with being on Wikipedia. In general, any random photo you find online without explicit licensing information would be considered copyrighted by its author by default. If you go to a meet and greet and take a photo of the ladies yourself, that would be your photo and you could then release it with an appropriate license for Wikipedia.
I wrote this Wikipedia page and contributed both of the pictures on it:
https://en.wikipedia.org/wiki/Acacia_Demonstration_Gardens--David