New research reveals that a species of bird 'paints' its own eggs with bacteria which protect the embryo - http://phys.org/news...
Researchers from the University of Granada and the Higher Council of Scientific Research (CSIC) have found that hoophoes cover their eggs with a secretion produced by themselves, loaded with mutualistic bacteria, which is then retained by a specializad structure in the eggshell and which increases successful hatching. So far this sort of behaviour has only been detected in this species of birds, and it is a mechanism to protect their eggs from infections by pathogens. - Halil
That's so cool! - Jenny H.