I have a doco tape here somewhere that has the cry of the arctic loon on it and it is a great sound that i want to hear along with the noises of a pack of hyaenas,that cacophony of sound like no other!
I suppose the sounds of wild dogs/dingo`s calling from ridge to ridge on a frosty night has its own appeal as well,though i do like the WHACK of a good projectile smacking into a big stags shoulder for probably the best