How to identify juvenile Yellow-legged Gull in Finland in late summer or early autumn?
Visa Rauste, 9 April 2006

Introduction  continued.
  A typical michahellis on the ground   a "dark argentatus" for comparison  the same bird with open wings
  A very fresh michahellis  some variation of michahellis  and a few argentatus.
  A typical michahellis in flight  a typical argentatus for comparison
  A few michahellis in flight to show variation  and some variation of argentatus
  A few michahellis tails  a few selected argentatus tails
  A few michahellis in flight from below  and argentatus...
  A few interesting individuals, #1    #2    #3    #4  
  Summary of the main characters
 


The collection of michahellis photos of birds on the groung
  in flight above (showing the primary window, often tail),
  in flight from below  and tails.