Sure - it really depends on the taxon - for the one I linked to above, there were few RG observations or images added to taxon page. For more common taxa with full image banks already curated by others, it´s different of course - for these, dialogue with the other regular identifiers about whether necessary and/or who has best images to annotate could make sense I think. Either way though, easy enough for others to edit your additions out if they think they are unhelpful - there are no limitations on who changes the image sets.
When you edit the taxon images you control the order.