https://bhgullsni.blogspot.com/2013/11/common-gull-green-j074.html
Northern Ireland Black-headed Gull Study: Common Gull - Green J074
Stephen's colour-ringed black-headed gull isn't the only Norwegian bird to be recorded here in recent weeks. A common gull, fitted with a ...
black headed gullnorthern irelandstudycommongreen