It would have been cool to have a time lapse camera focused on them for the past week. Two days ago I took a look at the nest and saw this.
When I first approached the nest there was still one fledgling in the nest. The baby took its first flight and landed about 10 feet from where it took off. There's that 4th egg as I had expected, never hatched.
If viable drill egg on each side carefully, drain contents and rinse for children to see what it looks like.
Not unusual one doesn't hatch, possibly due to food or simply never going to....
Setting up time lapse would be interesting to rig up for butterflies or birds, simply never had the right equipment to do it properly.
We would do that with eggs for Easter. Put a tiny hole in each end and blow out the egg leaving an empty shell to dye.
I would imagine that time-lapse equipment would be a few bucks.
Children find most unusual things fascinating, small eggs like this more difficult to work with.
Sure most equipment is expensive especially here!