Nov 20, 2011

One old Mew and our first 1Y to The Netherlands

During this weekends gull work we first noticed that the gulls have become difficult to catch in the city center lake. Partly due to very mild weather for middle of November but also much disturbance of people visiting a temporary marked close to the best place to catch. We therefore tried an alternative place close by. That strategy gave us a Mew Gull ringed with metal only. We later found that it was 19 years old and ringed in Stavanger January 1993 as a 2Y. Old birds like this one are very difficult to catch, they are extremely careful and not at all willing to take the same risks as the 1Ys. On the other hand getting color ring on an individual like this one with an exactly known age is of great value. When we know the breeding area as well the value is even greater. It's possible that this individual breeds at Prestvannet right outside Tromsø because 30th of May 1999 the metal ring was read here. Mews that breeds in the area around Prestvannet is previously known to winter in the area around Bergen. It was our guest from Mandal, Finn Jørgensen who nicely caught this one for us. This weekend Finn and us from urban ringing Bergen exchanged methods, good gull stories and looked at gulls together. A very nice and informative weekend.

The six oldest Mew Gulls in Norway with color ring observed in 2011
CodeAgeYear bornLocation*Date*
*The last location and date observed

J0L0 the 19 year old we equipped with color ring today. The fifth oldest Mew with color ring in Norway. It's moulting, P9 is growing and P10 is still old.

We also had our first 1Y Mew Gull observed in The Netherlands thanks to Frank Majoor who read it in Overijssel 17th of November 2011. The effort in August and September payed off. J6K6 was ringed at Tveitevatnet 08th of September and stayed in the Bergen until 15th of October. Measurement of skull and bill shows that it's a male.

J6K6 in Bergen city centre 12th of September 2011.

J6K6 southward migration

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