I received this certificate a few days ago for the World Wide Flora Fauna (WWF) program. It is awarded for working a total of 544 different WWFF reference areas.
Many thanks to Pit YO3JW, the WWFF Awards Manager.
Amateur Radio, Short Wave Listening, travel and history
Amateur radio experiences with VK1DA
Brisbane - Australia
german amateur radio station
Summits On The Air
SOTA on the peaks, wilderness QRP and some bushwalking
A fine WordPress.com site
Amateur Radio Adventures
Summits on the Ai
Amateur radio station from Belgium
Radio craft, homebrew, QRP/SOTA, AM
Ego loqui ad viros super montes
My adventures with Amateur Radio and Geocaching!
The rantings of VK2GAZ on his SOTA experiences in Australia
A survivor, with minor cuts and abrasions.
The Art and Craft of Blogging
The latest news on WordPress.com and the WordPress community.
Blog of Justin Giles-Clark VK7TW's SOTA and amateur radio adventures.
Occasional SOTA & Microwave operation
VK5PAS 
Very impressive achievment.
Well done.
Chris
VK4FR