Dear Roland
You can't add pictures to species notes I'm afraid. However the collaborative page with a link near the bottom of the Summary page is available to any logged-on user with member status. I have accorded you this status, so that you could add text and images relevant to a species on this. Pictures should be showing something of interest to the spider or its habitat or behaviour, etc and not lots of the same, but otherwise there is no set limit other than common-sense.