You just get a glimpse of this chick highlighted with the circle. This chick is at least 4 days old. It was this chick that got the first observed feed of the 2013 season on the 16th June.
As we don't have a colour-ringing scheme on Lundy, I identify the Guillemots by their relative positions on the ledge. The pair at this location, Site E, has successfully raised chicks every year since 2010.