Just been making out yet another "Overall Summary" to issue to recent observers, and I notice that there have now been 3,173 re-sightings of 1,013 individuals read at Strangford Lough so far this winter!! Whilst I know there are other significant numbers of records yet to be submitted to us from there, I think the 1,000+ in particular of individuals is worth a glass-up celebration!!
The ratio of only approximately 3 rings needing to be read for each new individual (which could be seen as a measure of both effort, total numbers of birds, and throughput for sites managing good coverage of significant numbers of birds), is a feature for Strangford Lough, and again illustrates the need for a concentration of effort there during the staging season. By comparison, from last winter's results, the ratios for the "main effort" sites (>200 resightings) were (first figure is number of records):
Dublin Bay: 6057 ratio: - 9.79
Strangford Lough: 1665 ratio: - 2.17
Baldoyle Bay: 976 ratio: - 5.55
Dundrum Bay: 777 ratio: - 6.17
Normandy: 383 ratio: - 23.94
Malahide Estuary: 272 ratio: 2.67
Just in case it is of interest to the mathematicians amongst us!!
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