2 red necked wallabies, one regular coloured the other was very white. possibly related to the much older walkaby with similar colourings which was first sighted back in 2018 and still around. This one is much whiter with darker nose and no dark mark up middle of head.
Wow - fantastic sighting! Yes agree with Helen, I think this would be called leucistic and maybe the other older less white wallaby would be partially leucistic.