|Reporting colour-ringed Oystercatchers|
Since 1983 Oystercatchers have been systematically studied as part of a long-term study of the University of Groningen, consequently many Oystercatchers on the Dutch Wadden Sea island of Schiermonnikoog are individually identifiable by their colour-rings. In total over 2500 individuals have been colour-banded, comprising adult breeders, juvenile and adult non-breeders, as well as fledged young. Of these banded individuals about 1000 are probably still alive right now, of which most live on the island of Schiermonnikoog. Nonetheless, Oystercatchers colour-banded on Schiermonnikoog have been reported from all over the Netherlands, Belgium, Germany, Denmark, France, UK and Norway.
Reports of colour-ringed Oystercatchers (dead or alive) are very welcome as they are crucial to understand survival and movement patterns of Oystercatchers, which form the basis for understanding changes in population numbers. Reports are preferentially send to us using a standard form (click icon to download form). We try to send each person that reports a bird to us a life-history of that individual. An exact description of the colour-rings we use is given below.
Reports can be send (preferably by e-mail) to:
Dutch Field Centre for Ornithology
P.O. Box 59, 1790 AB. Den Burg, Texel (NL)
Tel. +31 (0)222-369766
Description of the colour-ring systems used on Schiermonnikoog: colour-rings with characters
Each Oystercatcher has four different rings at
four different positions (see drawing below and picture):
2. Two large two-coloured rings with an engraved characters which is repeated three times on the ring.
3. A small single-coloured ring
Of importance are
The rings that are used:
last updated 12/08/07