This is an alternative suggestion for a symbolic system of house numbering. Instead of putting the numbers directly, animals would be used to replace each digit, according to the chart below:
It would sort of be like a secret code - a set of stone statues, garden gnomes, patterns, hedges etc. could all have additional meaning. Companies could commission statues of their representative animals in unique materials & positions. There would be an interesting market for these particular types of statues, as well as unique extensions / alternate digits. For a number like 123, you could have a lion & a monkey statue, next to an elephant statue - or you could break it up the other way.
Injecting more symbolism into daily life.