I chose the WWF logo because it is such a simple but good example of ambiguity of positive and negative space. The Logo was created in 1961 by co-founder Sir Peter Scott and the negative positive space version was made in 1986 at the San Francisco office of Landor. The logo was based on Chi- Chi, a giant panda for The London Zoo. I feel like this is a fairly know Logo, as I can Remember seeing it often in commercials growing up. What I think is really well down about it is that it is almost hard to see that it uses positive negative space. The white space blends so well with the black to create the shape that you miss the use of the pos/neg space and just see it as a panda. I also like how simple it is, it’s highly effective at grabbing your attention quickly and then with the use of pos/neg space can hold your attention. 

https://www.creativebloq.com/design/10-logos-make-clever-use-negative-space-61621038