KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 52. N:o |7. 59 
way, but it did not try to catch any of the small birds, which flitted among the 
trees or flew away from there. 
Cerchneis cenchroides ViG and HoRrsr. 
Math. handl. n:r 280: 2 juv. Meda, Kimb. 15/5 1911; 35 juv., 8 juv. Nooncanbah, Fitzroy r. !7/1, !!/3 1911; 
3 ad. Beagle bay, Dampier 1. ?!/7 1911, faded plumage; SJ ad., 8 juv. Meda, Kimb. 3/5, ?2/5 1911. 
Plumage. — The juvenals differ from the adults in having more spotted 
plumage. Lower neck on the back has the black streaks in the centre bigger and 
deeper. In the specimen ”!/ these streaks are very much reduced and remain only 
as slight indications. The juvenals also have the black spots on the lower back 
shaped like bars across. In the adults they are reduced, and in very old birds (the 
spec. ?'/+) they seem to grow more and more narrow and partly disappear from the 
wing-coverts and the upper back. 
Ecological. — This form was the most common species of falcons. It pre- 
ferred to live in the rocky walls both at Mowla Downs and at Sunday Island. I 
often saw it flying over the plain looking for prey on the ground. 
Fam. Pandionidee. 
Pandion leucocephalus GouLD. 
Math. handl. n:r 282. 
Was seen at Sunday Island and in Beagle bay. Three eggs were taken by 
Mr. HADLEY at the former place. In shape and colour they were quite like those 
which are obtained in Sweden. 
Order Strigiformes. 
Fam. Bubonide. 
Ninox oxellata HoMBR. and JACQ. 
Math.. handl.. n:r 285. 3 29 ad. Nooncanbah, Fitzroy r. 27/12 1910, moult.; !/1, 5/1 1911, new plumage. 
Three spec. were shot at Nooncanbah Fitzroy r. (WIDELL). 
Ninox occidentalis RAMSAY. 
Math. handl. n:r 289. 8 ad. Derby, Kimb. 15/9 1910, worn plumage; 1 SJ ad., I juv. Mowla Downs, ibid. 
12, 5/2 1910; new plumage; SJ — Fitzroy r. 1/3 1911. 
Juvenal. — The black centres of the feathers on the under side are absent. 
Breast light rusty-coloured with narrow dark centres. Lower parts tinted with light 
chestnut, without the dark centres. 
