xoB points to
this page documenting the hatching and development happening in a hummingbird's nest. If you go, keep clicking through; the first set is taken in 2003, but there is a new, sharper set for 2005, of which this is one image.
If it doesn't seem interesting, it's just the scale of the picture. You don't realize just how tiny this is! On the last page they have a toothpick marked at 1/2 inch segments, and a US penny, to show how small this chick really is. The chicks are smaller than that penny and the entire nest is about the size of your cupped palm (NOT including your fingers)!