Description: Size 4.25-5 inchesAdult Male: distinctive head and face pattern, bright yellow underparts and rump; tail can appear notched or slightly forked at rest.
Adult Female: upperparts greyer than male, rump yellow, head pattern less well defined
Juvenile: similar to adult female, but pale yellow face and breast, dull greenish-yellow rump and spots or streaks on sides of breast.
Call is a single or double 'tsssp' note, 'tseeuu', 'swee-et' or 'zeee-zeree-chereeo'.
Song is lively and rather canary-like but repetitive, and often delivered in short burts.
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