88 RUDOLF SÖDERBERG, STUDIES OF THE BIRDS IN NORTH WEST AUSTRALIA. 
The northern thickhead was not rare at Sunday Island, at Meda, and at Beagle 
bay (Dampier land). I always saw the bird at the water-pools or in the neighbour- 
hood of them, and at Sunday Island it was also found in the mangrove vegetation. 
Fam. Campophagine. 
Pteropodocys maxima pallida MaATH. 
Math. handl. n:r 503. 9 (juv.) Mowla Downs, Kimb. 18/;; 1910, strong moult. 
Moulting. — The specimen, which is in strong moulting, appears to be a younger 
bird. The dress has half the character of the juvenal, half that of the adult. This 
is especially conspicuous on the head and the upper part of the body and in the 
wings. The parts that have not been dropped on the upper parts of the body (head, 
neck, upper parts of back and breast) consist of single feathers in the newly-acquired 
french-grey plumage and are whitish grey with narrow bars of dark-brown. The new 
feathers on the sides of the face, throat and chin are also thickly barred with black. 
The bigger wing-coverts that are not dropped are dark-brown, tipped with fawn-buff. 
Ecological. — The bird was mét with only at Mowla Downs. Came here in 
small flocks of about 5—38 birds after the first rains. On the lö5th of Dec. I found 
the nest in a Eucalyptus-tree; it was built of twigs, earth and wool in a rather 
exposed position in a fork. In it there were three eggs. 
It is noteworthy that the bird shot at the nest (£) was in strong moulting 
and was a younger specimen just about to develop the plumage of the adults. 
Coracina nov&hollandie subpallida MATH. 
Math. handl. n:r 305. 9 ad., 1 juv. Derby, Kimb. 17/4 1911; 3 292 ad., S ad., I juv. Nooncanbah, 
Fitzroy r. 15/12, ?0/,2 1910, moult., /1, ?/1 1911, moult., 9 -ad., I ad. sex?, Beagle bay, Dampier 1. "7, "4 TITT. 
Juvenals. — Two, in ordinary juvenal plumage. 
Moulting. — Discoloration is very clearly shown in specimen no. 4, ”/. 
There are parts of the old plumage still left, especially in the wing. Those parts 
are of a pale sepia-brown colour, while the new feathers are black. (The contrast 
is very striking.) The new feathers have a whitish margin. This margin is worn in 
the old feathers. The tail-feathers are equally faded. 
Moulting-season. — To judge from the specimen in moulting this takes place 
in Dec. and Jan. 
Common in the places named above. Absent only at Sunday Island. 
Lalage tricolor indistinceta MATH. 
Math. handl. n:r 510. 2 SS ad., S juv. Derby, Kimb. ?!/10 1930, all moult.; 7 SS ad. Nooncanbah, 
Fitzroy r. S/1i2, 29/12, Yt/so, 16/40, 1/12 1910, all moult.; ?/i 1911, moult.; 2 SS juv. Beagle bay, Dampier 1. 
1, "1 1911; young birds shot even in April and August. 
