IDENTIFICATION OF YELLOW-LEGGED GULLS - 1-> Intro -
NORMAN DEANS VAN SWELM (RE-EDITED feb. 2011)
chapters: /1-intro - /2-bodytext -
/3-moult - /4-leg colour
- colour of the orbital ring - long call - /5-the gull in the middle - /6-the
Caspian or Black Sea Herring Gull
