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A Ringing success..

Glaslyn osprey diary

Follow the fortunes of a pair of ospreys breeding near Porthmadog in north Wales.

A Ringing success..

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It's that time of year again when we ring our osprey chicks. On Friday afternoon at 4pm all three chicks were successfully ringed with a BTO (British Trust for Ornithology) metal ring placed on the left leg and a white plastic ring on the right leg.

Plastic ringsThese plastic rings are for identification purposes, hopefully when these ospreys return to the UK to breed for themselves in three or four years, we'll be able to ID them in the field with a powerful telescope.

The metal BTO rings are placed on birds for recoveries, that is, injured or dead birds could be reported to the BTO giving a time, date and location.

Of the 2,000 or so ospreys that have been ringed in the UK since the 1960s, around 10% of these have been reported back to the BTO; some of these have been found in rather exotic locations such as Iceland and the Cape Verde Islands, one ring was even found in the stomach of a crocodile a few years back!

Apart from ringing the ospreys, we also measure their wing lengths and weigh them. These are their weights:

  • YC - 1230 grammes
  • YD - 1390 grammes
  • YE - 1547 grammes

Glaslyn osprey chicks, 2008Going by their weights and 'feel'  of the legs, we think we have a single gender threesome this year - probably all females, it is very difficult to know for sure however. Very strong winds today - gusting to 70mph but the birds seem fine sheltering as they do in the recess of the nest protected from the worst of the winds.

 

Comments
  • Today we noticed that for the first time the chicks are starting to look like young ospreys rather than chicks. It is so amazing how quickly they change and develop. What a lovely photograph! Hang on in there, girls! Lin and Reg, Osprey Project Volunteers
  • so pleased all the birds survived the high winds the other night. Another brilliant photo. Are you sure you haven't got one large female and two smaller males.
  • I can't believe how much they have grown. Good to know they are all healthy and clearly not bothered by the ringing. Any sign of the spare adult female?
  • been away for a few days and thus not logged on - so what a fantastic surprise to see the chicks SO BIG and looking so very healthy. Lin & Reg agree the chicks are young adults - its all so exciting.

    can't wait to pop down to see the action live over the coming weekend. Keep up the good work and fingers crossed that the weather is kinder to the family.

  • Hi guys - sorry I missed the ringing - I had a terrific time during my stint at volunteering - such a friendly team all working together for the good of the ospreys - and a brilliant sighting of hobby last week!!

  • I have been watching the family via this site for a while,and also from a bird watching view as the nesting site is virtually at the bottom of a friends garden in Prenteg.

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