Magpies, i kraack kraack back to them, to my astonishment whilst doing this, in constant reply to one magpie it then went into a frenzy on high and low pitch chirps and whistles, i thought i had broken a magpie, i was in amazment as i never knew they could do that
untill i looked it up and found out they do that
but its the only time that i've had one "sing" back
i like the calls young lion and tiger cubs make , like a short mauw, but obviously alot gruffer being big cats
also the funny little accidental prrruk a kitty cat makes when its playing and happy
high heels on concrete or in mud, but thats different kind on animal