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Goldcrest Regulus regulus L 9cm. Our smallest bird. Recalls a Phylloscopus warbler but note large head and white-ringed dark eye and colourful crown stripe. Sexes are dissimilar. Adult has greenish upperparts with 2 pale wingbars, and yellow-buff underparts. Note black-bordered crown stripe (orange in male, yellow in female). Juvenile is similar but crown stripe is absent. Voice Utters a thin, high-pitched tsee-tsee-tsee. Song is a series of high-pitched phrases that ends in a flourish. Status Common woodland resident; favours conifers but also found in deciduous woods, especially in winter. Migrants from N Europe boost numbers outside breeding season.