This video captures the mesmerising sight of hundreds of starlings in flight..
The flock - known as a murmuration - has been spotted above the RSPB Conwy nature reserve near Llandudno Junction at about 6pm each evening this week.
Experts say the flock keeps it shape because each airborne starling instantly copies its neighbour.
It is likely that the starlings stick closely together to avoid being picked off by predators such as peregrines falcons, merlins and sparrowhawks.
The remarkable birds can look light then dark, as they twist and weave in the sky.