See if you can get a photo tomorrow of the front of the bird - the breast. That's the best way to tell the males from the females, though sometimes it's not easy to tell. But they are more often than not paired up, so one of them above will be a male and the other a female. The male has a wider pink section in the centre of the breast, and the female has less pink and more of the zebra stripes going towards the centre of the breast.