Beginning in September 2011, a new stamp series featuring endangered wildlife will be issued by the United States Postal Service. Stamps will cost eleven cents more than a regular stamp, with the additional money benefitting wildlife conservation. Like many recent stamp series, they will come in sheets of twenty.
Here is an official announcement from the AZA website (with a mockup of the amur tiger cub stamp - very cool).
New Semipostal Stamp to Help Save Vanishing Species - Association of Zoos and Aquariums
Here is an official announcement from the AZA website (with a mockup of the amur tiger cub stamp - very cool).
New Semipostal Stamp to Help Save Vanishing Species - Association of Zoos and Aquariums