Brreding nests are carefully constructed from grass, the outer layer composed of broader blades 150–200 mm long and the inner chamber with a nesting cup woven from fine stems and seed-heads; woolly plant fibres and sometimes feathers are used to line the inner chamber. The total length of this structure is from 180 to 230 mm and is composed of up to 500 pieces, which includes an entrance is between 50 too 100 mm, in bottle or funnel shaped form. The nest used for roosting outside of the breeding season is a simpler design