Description
The Madeira Firecrest is a small plump bird, 9–10 cm (3.5–3.9 cm) length and weighing about 5 g (0.18 oz). It has bright olive-green upperparts with a bronze-coloured patch on each shoulder, and whitish underparts washed with brownish grey on the breast and flanks. It has two white wingbars, a tiny black bill and brownish-black legs. The head pattern is striking, with a black eye stripe, white supercilium and a crest which is yellow in the female and mainly orange in the male. Juveniles have a grey tinge to the duller upperparts, and lack the crown and eye stripes and supercilium; by their first winter, only the flight and tail feathers remain unmoulted, and the young birds are virtually indistinguishable from the adults in the field. This kinglet usually hops with its body held horizontally, and its flight is weak and whirring, with occasional jinking.
Compared to the Common Firecrest, the Madeiran Firecrest has a longer bill and legs, a shorter white supercilium, more black on the wings and a deeper golden-bronze shoulder patch; the male's crest is duller orange. Juveniles have plainer heads, lacking the dull supercilium shown by the young of the European species.
The vocalisations of Madeiran and Common Firecrests both consist of high-pitched notes, but the Madeiran bird has its song divided into three distinct parts, whereas that of the more widespread species just accelerates gradually and covers a much smaller frequency range. The calls of both species include high-pitched fine vocalisations zuu zu-zi-zi, although the Madeiran Firecrest also has a distinctive shrill wheez and a whistled peep.
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