I was walking the dog along a boardwalk section of a walking trail. There was much flapping in the grass right next to the path. Luckily, doggy was on the lead, because she loves chasing flappy things. At first, I thought it was an injured bird; we were so close to it, I thought that the only reason it hadn't flown off was that it wasn't able to.
On second inspection, I realised there were two of them down there. Doing it like on the Discovery Channel. They were so into it, they weren't going to stop just because some giant and her sharp-toothed companion were standing less than a metre away. I knelt down to take some porn a photo and they still kept going. You can see the spread out tail of the boy bird and the feathers under that, that's a girl bird (snigger). They are red wattlebirds, or anthochaera carnunculata; native to the southern areas of the Australian mainland. The dog was eager to join them. I said, "No, if I can't have any fun, you can't either."
Suddenly, they were up and in a tree... still going at it. Flew to another branch... at it again. It was fascinating for a while, but watching two animals with brains the size of a pea having a better sex life than me was eventually just depressing; so I walked away to the sound of excited squawking receding in the distance.