This stamp produced by the Australia Post to commemorate the International Postal Year features a photo of the shelled pteropod, Limacina helicina, by Census researcher Dr. Russ Hopcroft.



This stamp, produced by the Canada Postal Service to commemorate the International Polar Year, features a photo of an unidentified jelly by Census researcher Kevin Raskoff. To view more of Dr. Raskoff's photographs visit his homepage [4].
Links:
[1] http://www.coml.org/census-arts/ipy-stamp-australia
[2] http://www.coml.org/census-arts/postage-stamps
[3] http://www.coml.org/census-arts/international-polar-year-stamp-canada
[4] http://www.mpcfaculty.net/kevin_raskoff/default.htm