Australian Museum Journal Natal Downs and plumage changes in the Noisy Scrub-bird, Atrichornis clamosus (Passeriformes: Atrichornithidae)

Shortform:
Smith, 1985, Rec. Aust. Mus. 37(3): 157–163
Author(s):
Smith, Graeme T.
Year published:
1985
Title:
Natal Downs and plumage changes in the Noisy Scrub-bird, Atrichornis clamosus (Passeriformes: Atrichornithidae)
Serial title:
Records of the Australian Museum
Volume:
37
Issue:
3
Start page:
157
End page:
163
DOI:
10.3853/j.0067-1975.37.1985.307
Language:
English
Date published:
20 November 1985
Cover date:
20 November 1985
ISSN:
0067-1975
CODEN:
RAUMAJ
Publisher:
The Australian Museum
Place published:
Sydney, Australia
Subjects:
AVES
Digitized:
16 January 2009
Reference number:
307
EndNote package:
EndNote file
Title page:
Title page (140kb PDF)
Complete work:
Complete work (1146kb PDF)

Abstract

The newly hatched Noisy Scrub-bird chick has 60 to 81 natal downs distributed in three paired and two single dorsal pterylae. The downs are most numerous and longest on the capital and spinal tracts. The age of the chicks when the contour feather sheaths emerge and burst on the various regions of the body is described. Males and females show no differences in the natal downs or juvenal plumage. The first moult begins when the chick is 41 to 46 days old. The first basic plumage is like the adult female plumage except that the male has a faint grey pectoral band on the upper chest. The second moult takes place during the bird's second summer, through which it attains the second basic (definitive) plumage. The males differ mainly in having a black upper pectoral band. All plumages are described. The distribution of the 840 natal downs in five paired and four single pterylae (both dorsal and ventral) in one specimen of the Superb Lyrebird is described. The differences in the natal downs and subsequent plumages between the scrub-birds and lyrebirds are discussed.