Bushtits

@ Thurd,the Audio at the end of the link is interesting......

http://www.guardian.co.uk/science/punctuated-equilibrium/2010/dec/20/3 The nests are extremely well hidden . I stumbled on one because I was closely examining the flowers on a tree. It seems that the nest is so well insulated, that ,the bird does not have to sit on the eggs for incubation,once she lays them in the nest.

These are very cute birds. They are amazing builders and their nest is an architecture marvel.i have a picture of its nest in my spottings under the signs of wildlife mission.