Visiting Etosha National Park in early May this year we encountered what might be a once-in-a-lifetime experience: watching a flock, or rather flocks, of Red-billed Queleas at Goas waterhole one morning coming in for their daily drink. Apparently this usually happens twice a day, but my fellow waterhole visitors in the car got a bit fed up with the once-in-a-lifetime experience after a few hours and I had to leave the birds on their own for the rest of the day, to my utter dismay.