NEW SOUTH WALES 87 



— March in the north. The majority of internal 

 species in extreme circumstances will make east- 

 wards to the mountains, or to the tributaries of 

 the great rivers. If e.g. the Yellow-tufted Honey- 

 eater (Ptilotis melanops) refuses to go, the starva- 

 tion roll is heavy. 



The White-fronted Chat (E. albifrons) may be 

 a stationary or a partial migrant. In time of 

 drought a portion of the birds in their northern 

 limit will, before facing the south, deflect their 

 course to the east by south (e.g. 5 Map 35), and 

 summer in large numbers just north of the Blue 

 Mountains. They have been known to do this 

 in June, and nest in thousands. A flock of 250 

 will arrive in the south-west of the State from 

 southern Victoria. 



Map 35 shows the range of the various species of 

 chats. 



DISTRIBUTION of 



1. A species and its races. 



2. A species without races. 



1. Races shown in Map 36 may be : — 



A. Those found north of the Blue Mountains 



B. Those found south of the Blue Mountains 

 A good example of A is the Shrike Thrush (C. 



rufigaster), which grows less in size the further 

 north it lives. An example of B is the Crescent 

 Honeyeater (L. australasiana). 



