94 The Kmu. 
especially the fledgling and adult, these latter in P. falcata 
are clearly held together by an intermediate link associating the 
two extremes. Judging by two good illustrating specimens, 
the pectoral collar at first appears to be a grey one, which alters 
its pigment into brownish-black without a moult. A moult 
following makes the collar a dense black one. 
The young male, the young and adult females bear a likeness 
to each other. The breast-streaks of the young are retained in 
the male until the pectoral collar appears as in c, or the black 
streaks indicating youth are lost, by change of pigment, just as 
the pectoral collar appears (^.^., b). 
a. Young male, 21/8/00 (Cat. Birds Brit. Mus., vol. viii., 
p. 205). 
a . Young female, 24/8 bo. The brown bill indicates youth, 
and, excepting the ear coverts and orbital region, which are 
ruddier, it appears to differ very little from the young male a. 
The throat of a is whiter. 
b. Immature male, 13/8/00. A pale tawny wash is clearly 
seen upon the mostly white throat, which is distinct upon this 
specimen alone. The pectoral colour is superficially grey, with 
a black ground. This is owing to much of the peripheral and 
exposed portion of each black feather being grey. Lores and 
ear coverts very little greyer than adjacent grey parts. Black 
streaks of breast almost obsolete. [Irides reddish-brown ; 
bill black ; legs and feet brown]. 
c. Immature male, 28/8/00. The principal differences 
between this and an adult male are that the immature bird 
retains deep brown streaks upon its white throat and its rufous 
breast. The edges of some of the pectoral band feathers are 
still grey, and the ear coverts also are grey. [Irides reddish- 
brown ; bill, legs, and feet black.] 
d. Adult male, 27 '2/oo. The tendency of the male, when 
compared with its close ally, P. rufiventris, is to restrict the 
width of the black colour on the sides of the neck and to 
brown the black ear coverts. In no other respect do the 
males of the two species appear to differ. 
e. Adult female, 24/8/00. 
[This species is very animated. A male is singing to 
his mate before me now (2/2/01), with tail and wings ex- 
tended, feather on crown of head raised like a crest, and 
body feathers ruffled outwards. The bird's body seems to 
tremble through the power of the whistling note it is uttering 
— a note much more pow^erful than is usual. The male 
bird's head was within one or two inches of his mate's all 
the time. On 1/8/00 I found one of a pair building a nest. 
Visiting this nest a few days later I noticed it was still 
unfinished, and many feathers of the builder strewn about it. 
A hawk had probably eaten it.] 
