Logos: Ambiguity of Pos/Neg Space

I thought that this was an awesome logo using the technique of ambiguity of positive and negative space. 
The Kolner Zoo is a zoo located in Germany. This logo is very simple and effective. I thought it
was so clever how they used other zoo animals to make up the legs of the elephant. The image fits the place they are
advertising very well, it shows they have a variety of animals. I couldn't find who designed the logo on the website 
or anywhere online because everything I found about this zoo was all in German.