Wingspan 9-12 mm.
One of several similar very small but brightly-coloured moths, only around 5mm long. Quite distinctive with its metallic bronze and white-spotted appearance, but easily overlooked due to its size. Sometimes the white blotches have a bronzy suffusion and can become concolorous with the ground colour.
Members of this genus rest distinctively 'head-down'.
On the wing in June and July, this is a common species throughout Britain.
The larvae feed on the catkins of birch (Betula) and alder (Alnus glutinosa).