IMAGE COPYRIGHT.
The images posted on the website are copyright to the photographers who took them, using them for social media avatars, or other purposes breaches this copyright. The guys who take the pictures probably wouldn't mind supplying you the image to use for a beer or two, but it costs a lot of money to buy the kit that takes the pix so please bear that in mind.
The regular contributors here are: Soody Ahmad (SA Images), Ralph Darvill (Stixpix.org), Dawn and Ian Webster.