I thought I would start a thread about the WTE as a species and include a bit of an overview. The attached link has some basic information about the breeding habits, history, etc.
Since 1977 the juvenile White-tailed Eagle in following European countries are ringed with different colorings on both legs.
The right one stands for the country: Blue: Norway Green: Sweden, Lapland Black: Sweden, Baltic coast Black and white: Suomi, Lapland (two different areas) Red/red, white/red, and black: Suomi, Baltic coast (three different areas) without colour, that means silver: Poland Yellow: former German Democratic Republic (1981 till 1990) Orange: Federal Republic of Germany (since 1990 reunited Germany)
The colour on the left leg shows the age: 1977: orange 1978: blue 1979: red 1980: black 1981: silver means without colour 1982: black ring over red 1983: orange ring over blue 1984: red ring over silver 1985: black ring over blue 1986: blue ring over white 1987: red ring over black 1988: blue ring over orange 1989: red ring over white 1990: blue ring over black 1991: silver ring over blue 1992: orange ring over red 1993: black ring over white 1994: red ring over blue 1995: black ring over orange 1996: orange ring over white 1997: red ring over orange. 1998: white ring over black. 1999: blue over red. 2000: orange over black.
In Estonia coloured rings are used on 4 species of eagles and black stork. Coloured rings have been attached on the eaglets in the nests of white-tailed eagles since 1984 when Estonia joined the ringing programme of Northern European sea eagles lead by Bjorn Helander. Since then up to 600 young sea eagles have received rings around their feet and per 70 birds there is at least one encounter (altogether 180 encounters). All ringed sea eaglets have received a blue-white ring representing the country around their right feet and each year a ring of a different colour combination and denoting the birth year around their left feet. All sea eagles ringed in the same year receive a ring of similar colour around their left feet. In addition, both rings have an individual code that enables the nest to be determined where the bird is from and whether this bird has been spotted somewhere before. In case of some sea eagles it is known that there have been encounters more than ten times, especially in winter feeding sites. For example, one sea eagle that was hatched in Ahvenamaa in 1989 nests on Vormsi Island and winters on Turu islands where it is seen almost every winter. The oldest known sea eagle is 21 years old and it nests in Jõgevamaa. Here is a map that gives an overview of the re-encounters with white-tailed eagles ringed in Estonia.
Thu Mar 14, 2013 12:04 pm (Last edited: Thu Mar 14, 2013 12:20 pm)
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