Yellow-legged Gull

I found it back why I was thinking it is the yellow legged one.. At the age of 1y or 2y the legs are pink. But the yellow legged gull has a fine line that is much darker, horizontal at the back of the eyes. The herring gull looks a little bit different. The ANWB book is using drawings and no pictures. It's good explained but I look mostely also at many pictures via google. And thanks for your welcome words, Daniele. (I try to make pictures of the images in the book. and send them later, with the notes translated in English. It's fasinating to discover that in the city there are so many different types of them are pasing by. Before the book, it was simply a gull. :)

Thanks Daniele and Malcom... It's difficult to see in my book. I went back and I have seen gulls over there with Yellow and pink feet. The 19th I seen at an other park in my city gulls like this with pink and with yellow legs too. flying in the same group. Do you get no mixing of species? One kind that the other fertilized? For different types of birds I have the images of the wings on all sides, but in many cases this is not so, which compare a lot of inspiration comes together.

Thanks Malcolm... These gulls stays in a park in the center of the city. I use a book for the ID from ANWB. ANWB is the organisation from the Netherlands. It's not always easy to discover the wright one. Next week I go back, to look at the legs. I will post the link here. Thanks. Franky