Definition of "goldcrest" [gold•crest]

• A very small passerine bird, Regulus regulus, that breeds in Eurasia. (noun)

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• ""The goldcrest is a 'boom and bust' species - after cold winters only a quarter of the autumn population may be left to breed, but numbers can rally with pairs sometimes rearing more than 15 chicks in the following spring and summer," said Dr Harrison."
• "If you have never heard the lilting song of the linnet, spotted the distinctive plumage of a goldcrest, or waited for the whirring wings of a grey partridge, it is increasingly unlikely that you ever will."
• "Waterbirds such as the kingfisher suffered very high mortality rates when rivers and streams froze over, while small insect-eating species such as the treecreeper, goldcrest, wren and long-tailed tit died because of widespread "glazed frosts", a layer of ice over the branches of trees which covered up their food supply."