Eric Hosking 



a. Cormorants breeding in a colony : colonial nesting favours a high rate of infection with 

 bacteria as well as fleas and other ectoparasites 



Money Salmon {by flashlight) 

 b. Shearwater at entrance to its burrow: host of the most interesting British bird flea, 

 Ornithopsylla laetitiae, only known from the British Isles. This bird is attacked by a latal 



virus disease 

 Plate XXXIV 



