12 May 2012

Why another Brenttags year?

Actually it was our intension to catch around Nibe Bredning back in 2010 – but we failed. One of the main purposes of the 2012 study is to explore if there is a partial segregation of the flyway-population in a western and an eastern segment. We have followed light-bellied brent geese with satellite transmitters from catchsites in the western Limfjord area in 1997, 2001 and 2011 – and are marveled over the fact that all geese we managed to track on the autumn migration, flew to Lindisfarne in England to winter (1 in 1997, 8 in 2001, 6 in 2011) –  although we know that approx. half of the population winters in Denmark in Nibe Bredning, Mariager Fjord, along the Kattegat coasts of northeastern Jutland and north Funen, and in the northern part of the Wadden Sea around the islands Fanø and Mandø.  It is also a surprisingly big share of the birds that has flown to Greenland (2 in 1997, 1 in 2001 and 4 in 2011 + two that made the journey halfway towards Greenland before reversing towards Svalbard). So we also intend to explore if eastern wintering birds tend to summer in more eastern parts of the Arctic.