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and our party were interested in watching the assiduity with 

 which the old birds carried out their paternal duty. From 

 before daybreak until long after dark at night their cries might 

 be heard as they flew over our camp, carrying lizards, tfec, to 

 their clamoring broods. Near the Fitzroy River they were 

 found building their nests in March. 



No. 16. HiERACiDEA BERIGORA (Western Brown Hawk). 

 In the early part of our trip these birds were frequently noted 

 in the mulga scrubs and forest country. Owing to their size, I 

 regret I was unable to collect a series of skins to illustrate the 

 variation in their plumage. Their habits and courage closely 

 resemble those of the foregoing species. 



No. 17. TiNNUNCULUS CENCHROiDES (Nankeen Kestrel). 

 This Kestrel was found during the early portion of our journey. 

 Its habits are well known, and show no variation in the different 

 parts of the Continent. Unlike any of the foregoing members ot 

 the order, the Kestrel frequently makes its nest in the hollow 

 spout of a dead tree. On 2(Sth August I took four eggs from a 

 tree near our camp, and was surprised to find the nest lined with 

 pellets of camel dung. This is probably the first time this 

 material has been used for nest-lining. 



No. 18. Pandion leucocephalus (White-headed Osprey). 



These birds are very numerous all along the North- West Coast 

 and the course of the Margaret, Fitzroy, Gascoigne, Ashburton,and 

 Oakover Rivers. They seldom venture far from water, and their 

 nests are usually placed in trees on the margin of the streams 

 mentioned. 



No. 19. NiNox BOOBOOK (Boobook Owl). 



One of the most familiar sounds to be heard during the night, 

 wherever timber was large enough to afford sufficient shelter, 

 was the note of the Boobook. These birds were heard, and seen, 

 near Lake Way and they were also numerous throughout the 

 course of the rivers and creeks. Early in August a pair flew 

 from the hollow branch of a large tree on the margin of a creek 

 where we were shooting ducks. As I thought they had their nest 

 there, the late Mr. Jones obliged by chopping out the limb, with the 

 result that we found the nest just ready for eggs. During the 

 day the birds are freqently seen amongst the foliage of the 

 trees. 



No. 20. Cacatua leadbeateri (Leadbeater's Cockatoo.) 



These birds were only found in the desert, where morning and 

 evening they were noted in their journeys to and from water or 

 feeding on the bushes and ground.. They were usually in pairs. 



