- Birds MS & Stamps British Virgin Islands WWF Stamps 1988 – Brown Pelican 4 months ago ken yong NOTE: Mounted mint SGD4.50
- Birds MS & Stamps Bahamas Stamps (joint) 1999 – National Trust 40th Anniversary • Birds 4 months ago ken yong SGD6.00
- Birds MS & Stamps Croatia WWF Stamps (joint) 2017 – Eurasian Griffons 4 months ago ken yong SGD6.00
- Birds MS & Stamps Vietnam Stamps 2013 – Vietnam & Singapore Joint Issue • Roosters & Pheasants 4 months ago ken yong SGD4.00
- Birds MS & Stamps Jersey Island MS 2018 – Links With China • Birdlife 4 months ago ken yong SGD4.50