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Size of goldfinches http://www.lbcarchive.co.uk/forum/viewtopic.php?f=2&t=25333 |
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Author: | Jim Wright [ Wed Mar 01, 2017 9:13 pm ] |
Post subject: | Size of goldfinches |
Is there any evidence that the goldfinches of today are chunkier than their counterparts of, say, a couple of decades ago? Maybe I'm imagining it but they don't seem to be as diminutive and lightweight as I remember them from yesteryear. |
Author: | Stuart Britton [ Thu Mar 02, 2017 10:01 pm ] |
Post subject: | Re: Size of goldfinches |
On February 28th I ringed 37 Goldfinches at a garden feeding site near Osgodby. 22 were males and 15 were females. The largest male had a wing length of 84mm and a weight of 18.3g ( which is exceptional) and the smallest female (they are sexually dimorphic) had a wing length of 76mm and weighed 14.0g. With such a spread it would be difficult to say whether they are larger than 20 years ago and my gut feeling says "no". |
Author: | Jim Wright [ Sun Mar 05, 2017 2:19 pm ] |
Post subject: | Re: Size of goldfinches |
Thanks for the info, Stuart - appreciated. Jim |
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