FOURTH SEASON (1921): RECORD 151 
“ bubble,” and with the exception of a call or two 
by a male bird, no Cuckoo notes were again heard 
on the common. 
Further consideration of this Cuckoo will be 
left until after I have dealt with this season’s 
experiences of other Cuckoos on another common 
some three miles distant. To these I shall add 
some observations of three enthusiasts who have 
co-operated with me in studying, in different 
localities, Cuckoos parasitic upon other species of 
fosterers. 
