Argentatus Herring Gull Long Calling

A short video showing a long calling Argentatus Herring Gull, from Skeppsbron, Sweden. The bird is most likely a 4th Calender, note the tones on the bill. Also there was some dark marking on the bird upper primary covert's on the open wing, which helped to age the bird. Filmed handheld on September 23rd 2015.