Fig. 35a 

 The world distribution and numbers of breeding North Atlantic gannets; the 

 results of the world gannet census in 1939. All the known colonies are marked and 

 the number of occupied nests (which is approximately the same as the number of 

 pairs) at each colony is shown. Circles with dotted centres show the sites of extinct 

 colonies; at Great Saltee about six birds were about but no nest was found. 



