I saw a paradise duck land on a power pole - unusual in itself, but more startling when it got an electric shock and fall squawking to the ground. The duck survived but it swayed as it waddled in circles for some time afterwards!
One evening while taking the goats for a walk I noticed some hens acting oddly, running around in circles rounding up their little chickens and chasing them into the hen house. Looking up I saw a native falcon cruising - he was looking for a feed and the hens knew it. Another day I saw a hawk chased away by a flock of sparrows - it looked like something out of a horror movie.
The other day I was out with my camera in the pouring rain, and sitting in the car waiting for the deluge to reduce to a shower again I saw a small stoat running crazily in odd directions. As I watched I realised it's problem - it was trying to get to shelter but it was raining so hard the puddles were forming so quickly and the stoat was trying to avoid taking a swim, hence it's strange route. It eventually got to shelter but I missed getting a photo of it, as much as I tried. Instead I had a shot ruined (?) by a fish jumping just at the wrong time.
I love the fact that I can take the time to see these things, and a part me wonders what goes on when I am not watching - what do I miss?