How to catch a skua with a chicken egg

Normally we catch skuas on their nest. They are very motivated to incubate their eggs, so they will always want to return to their nest. Our catching devices are all designed to catch the bird when it sits on its eggs. So it is very frustrating if you can’t catch the birds back anymore, simply because they lost their eggs. Out of this frustration Geert got the idea to try to lure the skuas with a chicken egg and canned fish. The first bird he tried this on was immediately attracted and started to eat the (raw) chicken egg.

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Arctic skua eating a chicken egg

The day after we tried several catching devices, a ball chatrie, a piece of netting on the ground with lots of nooses for the bird to get trapped in, our normal catching device with a remotely operated noose and a clapnet with a chicken egg attached to the trigger. The last method really worked, although the bird managed to gobble down the whole egg (boiled this time, so it would take longer to eat the whole egg) without triggering the clapnet. Then we decided to trigger the clapnet with the remote controller and caught two loggered birds, not on their nest but lured by a festive meal consisting of canned sardines and chicken eggs!

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the clapnet hidden under moss and the festive skua meal consisting of two chicken eggs and a sardine
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Geert with a skua lured with a chicken egg to the clapnet

We tried the method on more birds, but the trick only worked for two birds. Since nearly all birds lost their nest, some of them are no longer on their territory. That brings the total of retrapped Arctic skuas to 11, plus one logger apparently lost by a skua, that we found back on the tundra by chance !

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