Feathers, staying critical into the survival of the bird, have to have upkeep. Besides physical use and tear, feathers face the onslaught of fungi, ectoparasitic feather mites and bird lice.[157] The physical condition of feathers are maintained by preening frequently with the applying of secretions from your preen gland. Birds http://tituscludl.loginblogin.com/10607033/little-known-facts-about-birds-and-the-bees