I was initially looking for a good book on identifying Imperial Moths because apparently there are different subspecies here where I live. When searching Google Books, I really could not find what I was looking for. After that, I took a closer inspection of an observation of an Imperial Moth - https://www.inaturalist.org/observations/67119215 by @akahl (same picture below).
The most surprising aspect of the observation is that it original occurred in 1983! What are the oldest observations by observation date, and should it be encouraged to upload very old observations? My apologies beforehand if this topic has been created already.