. Bulletin of the British Ornithologists' Club. 45 [Bull. 1979: 99(2)] Nest description and plumage variation of the Sepia-brown Wren Cinnycerthia peruana by Michael Gochfeld Received 7 November 1978 Two little known wrens, the Sepia-brown Wren Cinnycerthia peruana and the Rufous Wren C. unirufa occur in sub-tropical and temperate Andean forests. On 23 September 1972, at the Carpish Pass, Department of Huanuco, Peru, Stuart Keith, Dan and Erica Tallman, and I, found a nest of C. peruana in very wet cloud forest at about 2700 m It was about m above the ground, suspended from a
. Bulletin of the British Ornithologists' Club. 45 [Bull. 1979: 99(2)] Nest description and plumage variation of the Sepia-brown Wren Cinnycerthia peruana by Michael Gochfeld Received 7 November 1978 Two little known wrens, the Sepia-brown Wren Cinnycerthia peruana and the Rufous Wren C. unirufa occur in sub-tropical and temperate Andean forests. On 23 September 1972, at the Carpish Pass, Department of Huanuco, Peru, Stuart Keith, Dan and Erica Tallman, and I, found a nest of C. peruana in very wet cloud forest at about 2700 m It was about m above the ground, suspended from and partly penetrated by a curving bamboo Fig. 1. Diagramatic drawing of nest of Cinnycerthia peruana. The nest mass was firmly tethered to the support by fine rootlets. The overall size was 20 x 30 cm by 15 cm high. The main pouch containing the nest cavity was about 10 x 15 x 15 cm, consisting mainly of rootlets into which small strands of green moss were woven. The upper portion of this pouch was composed mainly of dried bamboo leaflets. The down-turned tunnel had a nearly circular entrance 3 cm in diameter, which was completely en- circled by green moss. The nest contained a 1 day old naked chick and a pipping egg. The egg's ground colour was pale creamy white and it was sparsely speckled with red- dish brown, particularly toward the larger end. It measured x mm. Taczanowski (1887) describes a single egg found 26 August 1871 as white with few small reddish spots and measuring x mm. He does not mention the nest or young nor other habits. Schonwetter (1971) gives measurements of ( g) for egg(s) attributed to C. unirufa. White head feathering We captured and photographed an incubating bird, and this had white feathers encircling the eye and on the forecrown. Of the 7 Sepia-brown Wrens we saw in a group nearby, 3 had conspicuous white feathers on the head, including one with a white forecrown, chin and face. Although known to field ornitho
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