European Herring Gull with GPS logger Green M.AMH – 20140503

Images of male European Herring Gull Larus argentatus argenteus Green M.AMH, fitted since last year with a GPS logger for research purposes.

All photos were taken on 3 May 2014 in the breeding colony on the isle of Texel in the north of the Netherlands.

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Green M.AMH hovering over its marked nest:

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Green M.AMH performing the landing call while approaching the nest:

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For more information about the project, visit the article Foraging opportunities for Herring Gulls from Texel throughout the annual cycle. To see the most recent GPS track on the site for Green M.AMH, filter the map on Logger 6016 (yellow track).

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3 thoughts on “European Herring Gull with GPS logger Green M.AMH – 20140503

  1. Looking at those map traces, those gulls do seem to have specific individual habits. Green M.AMH seems to like flying up and down the coast. If I’m interpreting that correctly.

    Do they eventually need to catch the gulls again to retrieve the GPS trackers, or are they designed to drop off after a certain period of time? I think you once said that they were attached to a harness?

    • That’s correct Phil, one of the things that came out of this research project is the very specific feeding habits and feeding locations that these gulls have. Incidentally, they will alter their diet as soon as they have young (a switch to nutritious sea food) and change it back again once they have raised their young.

      The logger is indeed fitted with a harness and has to be removed by catching the bird. This is done during the early part of the breeding season when they are incubating. They are caught by placing a walk-in cage over the nest.

      Incidentally, it’s the same project as the one for the Lesser Black-backed Gulls described in this thesis: https://gullstothehorizon.wordpress.com/2013/06/17/a-must-read-thesis-on-the-breeding-and-foraging-behavior-of-dutch-large-gulls/.

      • I did once read somewhere that gulls will change their diet when feeding their chicks – that they catch more fish and will try to avoid feeding garbage to the youngsters, for example. I’m not sure if the info came from this study or not.

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