Primary pattern differences between juvenile European Herring Gulls and Lesser Black-backed Gulls – 20140707

The images below are of juvenile European Herring Gulls Larus argentatus argenteus and Lesser Black-backed Gulls Larus fuscus graellsii (Dutch intergrade), and nicely show the differences in especially the inner primaries.

All photos were taken on 7 July 2014 in the gull colony of IJmuiden (Forteiland), near Amsterdam, the Netherlands.

The first 4 images are of Herring Gulls, the last 4 images are of Lesser Black-backed Gulls.

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2 thoughts on “Primary pattern differences between juvenile European Herring Gulls and Lesser Black-backed Gulls – 20140707

  1. This was very nice photos! For me the HGs look very similar to what we see in our Gull chicks in southern Norway, but your LBBG wings are much paler! All are paler, but especially Y.BTR are a bird that makes me wonder. Especially the fact that your wings are not uniform in darkness over the whole hand, they are paler in the inner part. In Norway we normally see that the chicks are evenly dark, both innerweb and outerweb, on all primaries. It would be interesting to see Y.BTR as an older bird, by the way 🙂

    • Thanks Morten, that’s very interesting to hear. Yes, the inner primaries can be rather pale in our Dutch intergrades, which is shown well in YBTR. I will keep an eye out on YBTR for you over the next couple of years to show you how it turns out 🙂

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