This weekend the first of our Dutch juvenile Lesser Black-backed Gulls that are fitted with a GPS logger spent time away from the vicinity of the IJmuiden Forteiland colony.
On Sunday 28 July 2019, Green YCZT flew out to the North Sea in the early morning, spent a few hours there, flew back to the coast and took a left turn away from IJmuiden to eventually fly inland to Alkmaar, some 20 kilometers away from the colony.
It did not stay there but immediately flew back towards the coast, turned left to follow the dunes back towards IJmuiden where it first passed the colony to spend some time on IJmuiden beach, briefly returned to the colony only to fly on to nearby Wijk aan Zee beach and then to return to the colony again, more than 12 hours after it had left in the morning.
Quite a day for such a young bird!
About the project
The tracking study is part of an ongoing collaboration between UvA (Dr. Judy Shamoun-Baranes) and the NIOZ (Dr. Kees Camphuysen). The study is being conducted within the project “Interactions between birds and offshore wind farms: drivers, consequences and tools for mitigation” funded by NWO Applied and Engineering Sciences Open Technology Programme, Rijkswaterstaat and Gemini windpark. The tracking study will provide complementary information on the movement patterns of gulls breeding along the North Sea coast, with similar objectives to the studies conducted on Texel and Schiermonnikoog. The main aim is to identify intrinsic and external drivers of movement from fine scale flight behaviour to seasonal migrations. While adult gulls from other colonies have been tracked since 2008, little is still known about the daily movements and flight behaviour of juveniles and how this differs from adults. This study will contribute to our knowledge on how juvenile birds develop their foraging and migration strategies and how their flight behaviour differs from adults.