Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
The way i see it is; the duck is interacting with the road in a way that the heron isn't with the sign (unless the idea is that the heron is choosing not to fish).
edit: I've just looked back at the original thread and think the best one is actually the kingfisher one from planetx