Mutualism between hoopoes and bacteria

This study provides strong evidence of a mutualistic association between hoopoes and antibiotic producing bacteria, whereby the bacteria protect embryos against infection.

Special structures of hoopoe eggshells enhance the adhesion of symbiont-carrying uropygial secretion that increase hatching success

Manuel Martín-Vivaldi et al.

http://onlinelibrary.wiley.com/doi/10.1111/1365-2656.12243/abstract