Blood and zZ signs pluus other symbols

[The Eagle]

Do the blood and tracks wash out in the rain and also I have come across some signs/symbols that I don't what they stand for? Is there a place out tutorial that would explain some of them. Example are zZ and some kind of feed zone?

[McSqurl Nugget]

rain has no effect on tracks. Not sure if there's a tutorial but Zzz's are rest zones, the water drop is a drinking zone, and the little leaf thing is the feed zone