24 January 2013

Clamorous Reed Warblers – Alba Marsh

At the weekend we caught six Clamorous Reed Warblers all of which were re-traps. All birds had been ringed originally at the same site with two birds caught in winter 2011, the earliest one on 8th February 2011. This shows that birds are site faithful and that the Marsh is a suitable place for quite a few wintering/breeding pairs of birds. One thing we noticed was the eye colour on the older birds was orange compared to the dark brown of the younger birds (birds aged through re-trap data). This may be a good way of aging birds if it remains constant – we will keep a check on this to see if it is an age related occurrence or not.