What we usually recommend is that you simply post to the gallery (hit the gallery tab and then click opload photo, follow the instructions). If you know or suspect that the picture shows something special (a new species or new, distinct subspecies for Opus, a female where only male is available, or a much better picture than the one in Opus), then a little note in this forum
will catch the attention of the Opus editors.
Above was the simple version. In reality uploading a picture to Opus seems a little daunting first time you try, but by the third one it seems routine. All other sorts of Opus editing is really easy
Send me a PM or make a request somewhere in this forum
if anyone would like to try but feels it is scary.