THE BIRDS OF AUSTRALIA. 
largest had gone. Nov. 1. Both young were in a tree close to the nest, the 
smaller bird flew with difficulty. It was in the nest at 5 p.m. the evening 
before. These birds seem to leave the nest as soon as they can fly.” “ Both 
male and female fed the young. The young have a double squeaky call, 
which is also used by the old birds when answering or calling to their young. 
When the young call, their tail gives the same upward flick as the old birds.” 
“ The old birds have a melancholy note and also a lively ringing one, not unlike 
that of Pachycephala falcataP Then another observation which gave absolute 
and important results as : “ Nov. 10, 1908. Nest found, placed in a perpen- 
dicular fork of a small fish poison bush, three feet from the ground, containing 
one egg. Nov. 11. Nest with two eggs, second being laid before 5 p.m. to-day. 
Nov. 25. Nest still contains two eggs. Nov. 26. 4 p.m., nest now contains 
one blind, naked young and one egg. Nov. 27. Nest now has two blind and 
naked young. Dec. 1. All quills are now through the skin, though the birds 
are still blind ; no down. Dec. 2. Eyes are now partly open, primaries are 
half an inch, secondaries three-eighths, and greater wing-coverts a quarter of 
an inch long and tips show dull brown through their sheaths. Dec. 3. Eyes 
well opened. Dec. 6. Nearly fully-feathered, only a few feathers are still 
in their sheaths. Dec. 7. Only one young in the nest. Dec. 8. Both young 
had gone.” 
From the preceding it appears that the time of incubation is about sixteen 
days and the young leave the nest about ten days after they are hatched. 
Mr. J. P. Rogers’s notes from Derby, North-west Australia, given by Hall, 
on the Bufl -sided Robin, read : “In the thick growth of a bank of the river 
I collected and heard the calling of the birds, Aug. 1, 1900. The notes were 
two clear whistling calls repeated rapidly nine or ten times, during which the 
motions of the bird resembled those of a Dove, bowing its head and raising its 
tail. This latter was extended at every call. The white of wing is conspicuous 
when the bird is sitting. On Dec. 8, 1900, I saw an adult feeding a young 
Cuckoo. It appeared to be of the Black -eared species. At 3 a.m. to-day, 
Dec. 9th, I heard the call of a Cuckoo.” 
This species seems to be divisible into several subspecies, which I have 
separated at different times, thus : “ P. superciliosa belcheri. Differs from P. 
s. cerviniventris in having the grey band in the throat, and the bufl on the sides 
very much lighter. It is also lighter on the back, and slightly smaller. 
Napier Broome Bay, North-west Australia.” Then : “ P. superciliosa derby ii. 
Differs from P. s. belcheri in having the fore-head brown instead of blackish, 
and in having more white on the outer tail-feathers. Derby, North-west 
Australia.” Lastly, “ P. superciliosa gregori. Differs from P. s. cerviniventris 
in having the band on the upper-breast much lighter, the belly and abdomen 
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