Judy,
My azureus are about 13 months old. I've posted about them before although the pictures may not be visible in the posts. I'll try and put a few pics in my album. To be honest, I've never heard the male calling. He's probably been calling but I didn't hear it or assumed it was my Leucs. The male is Stewart line and the female is Nabors line.
My females are extremely friendly and are not bothered by my presence and will come right up to the glass and stare at me and when I open the lid they don't take off like my Leucs. Also, I use a small 50 dram vile to place the flies into their enclosures and the females will actually jump right into the mouth of the vile while I'm holding it and start eating.
In case anyone is curious...I only have five different types of plants in the tank along with two pieces of Mopani wood and a small cork tube halfway buried into the substrate(The frogs will crawl into the tube and use it for shelter). The plants grow so fast that I can't keep up with pruning them back. The plants I have in there are; Ficus repens, Pothos, Philodendron, Pellionia repens, Peperomia. These plants grow very well in a dart frog environment.