THE BIRDS OF AUSTRALIA. 
different forms. This would give us six subspecies of a “ moving but not 
migratory ” Cuckoo resident in Australia, a result probably in agreement with 
nature but “ contrary to preconceived ideas.” At the present time specimens 
are not available for differentiation on these lines, but differences can be 
seen in specimens which I conclude are individual, whereas they may be 
geographical. 
310 
