After many days of waiting and constantly feed them plenty of insects, on Tuesday morning March 17, 2009, discover 4 empty egg shells on the floor of the aviary. 3 empty egg shells are from the bottom end part of the egg (the pointy side) and 1 empty egg shell is from the top round part. So I can conclude at least 3 eggs hatched. Few hours later in the morning, observe the father catch small insect and fly to the nest, possible feeding the babies. Looks like that the female incubated for 11 days. Outside temperature during the incubation time is pretty low with the high around 75F, and low around 50F. Here are the pics of empty egg shells. The one in the aviary is too far for me to reach in and take it out.