Nature Protection Society stamp from Austria

The last two weeks I was on a trip to Austria and Italy. When I was in Austria I was in a post office where I bought some nice Austrian stamps.
One of them is this:

100 years of Nature Protection Society of Austria (issued 07-06-2013)

The Nature Protection Society of Austria is the oldest environmental organisation in Austria and has about 80 000 members.
The stamp shows the logo and a kingfisher.