Plum-headed finch the eyes are dark brown. In the male there are also a rust colored bib and a frontal stain of the same color (often with a brighter color tending to purple red), which in the female are reduced or absent, in any case with a predominance of brown on red; they also have less dense stripes. The female is similar to the male but lacks the male's black chin spot. The plum-headed finch breeds mainly from September to January in the south and from August to March in the north. The nest is round, laterally compressed chamber of green grass
Metacresol purple CO dissolves as CO is acidic. In chemistry, it has two useful indicator ranges: Metacresol purple Metacresol purple or m"-cresol purple, also called m"-cresolsulfonphthalein is a triarylmethane dye and a pH indicator that is used in medicine to detect end-tidal carbon dioxide to ensure successful tracheal intubation in an emergency as the indicator inside a colorimetric carbon dioxide detector. It can be used to measure the pH in subzero temperatures of saline or hypersaline media. In colometric capnography the indicator is incorporated in a matrix that provides a pH just above the indicator's colour change, it undergoes the colour change