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| Speedy Goldcrest http://www.lbcarchive.co.uk/forum/viewtopic.php?f=4&t=23589 |
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| Author: | Stuart Britton [ Sat Jan 02, 2016 11:24 pm ] |
| Post subject: | Speedy Goldcrest |
At 0930 on 12th October 2015 I took a Goldcrest out of a net at Donna Nook bearing a Danish ring. I've just found out that it was ringed the day before - unfortunately we don't know the exact time. Nevertheless a bird weighing 5.0 grams (exactly the same as one 20 pence piece!) travelled 574km in no more than 24 hours - incredible. |
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| Author: | John Walker [ Sun Jan 03, 2016 5:14 pm ] |
| Post subject: | Re: Speedy Goldcrest |
so average 15 to 16 mph and if a following wind pretty normal isn,t it Stuart ? if they took much longer wouldn,t they run out of energy and ditch . regards John |
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| Author: | Stuart Britton [ Sun Jan 03, 2016 5:53 pm ] |
| Post subject: | Re: Speedy Goldcrest |
John, It's the first time we've experienced such a swift crossing and your speed estimate seems about right. I remember seeing exhausted Goldcrests literally flopping into the sea about a mile offshore whilst sea fishing. Their energy is the fat reserves they can store - the heaviest Goldcrest I've ever handled is 6.7g but birds that are obviously in off can be as light as 4.5g and potentially fatal. |
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| Author: | John Walker [ Wed Jan 06, 2016 12:00 pm ] |
| Post subject: | Re: Speedy Goldcrest |
I believe Birklands RG who spent 12 days on the Theddlethorpe site this autumn ringed a good number of GCs and several were just above 4 gms , I cannot remember for sure but think they had a Danish ringed bird ?. and I recall seeing dying crests on the strandline many years ago and also finding fresh corpses washed up a sad sight. regards and best wishes for 2016 Stuart, John. |
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