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 Post subject: Size of goldfinches
PostPosted: Wed Mar 01, 2017 9:13 pm 
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Lincs Bird Club Member
Lincs Bird Club Member

Joined: Fri Apr 11, 2014 9:39 pm
Posts: 386
Location: Cleethorpes
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.


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 Post subject: Re: Size of goldfinches
PostPosted: Thu Mar 02, 2017 10:01 pm 
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Lincs Bird Club Member
Lincs Bird Club Member

Joined: Wed Dec 29, 2004 6:44 pm
Posts: 1608
Location: Market Rasen
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".


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 Post subject: Re: Size of goldfinches
PostPosted: Sun Mar 05, 2017 2:19 pm 
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Lincs Bird Club Member
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Joined: Fri Apr 11, 2014 9:39 pm
Posts: 386
Location: Cleethorpes
Thanks for the info, Stuart - appreciated.

Jim


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