I witnessed my first nuptial flight today! 12th September 2017 in Sydney, Australia. About 1-2pm, first hot day in a while 30 degrees, moderately windy 30-40% humidity. There is rain forecast tomorrow, first time in a few weeks.
There was a swarm of flying alates at a particular corner outside my house. I watched as the males frantically rushed to mate with the queens. It was amazing to see! I think every queen was mating with a male right before I captured them, I was just waiting for them to finish up. They also seemed to come in waves, might be due to the wind?
The queens were a bit larger than the males (queens 5mm males 4mm). Queens have yellow gasters whereas males are all black. I caught 7 queens but I think one is already dead
Album: http://imgur.com/a/0oP6f