Currently it's something I set up based on what I notice from various trip reports etc.

I'm planning on expanding the feature so you can compare lists with friends; view their sightings reports; and most importantly, adding your own friends (or removing!). In the meantime, if you'd like more friends, send me an email and I'll sort it for you.

Likewise, if anyone else wants to try these features and have friends who use the site, please email.