The Lincolnshire Bird Club

The LBC Forum. To register on this forum YOU must NOW be a member of the LBC - see Membership Page for details.
To join the LBC Forum you must be a Member of the Lincolnshire Bird Club - Click here for Membership Information
If you would like to post an item, but ARE NOT a forum member please submit information using the Record Form: if suitable the information will be posted on the LBC Forum on your behalf.

It is currently Sat Apr 27, 2024 5:14 am

LBC Homepage - The Photo Album - Submit a Record (for Non-members)/ or Request - LBC Forum Information and Access Help - Forum Information

View unanswered posts | View active topics


Board index » Lincolnshire Birding » Lincs Bird Chat

All times are UTC [ DST ]



Forum locked This topic is locked, you cannot edit posts or make further replies.  Page 1 of 1
  [ 8 posts ] 
  Print view Previous topic | Next topic 
Author Message
Andy Atkinson
 Post subject: Bittern male or female
PostPosted: Thu Nov 07, 2013 8:13 pm 
Offline
Lincs Bird Club Member
Lincs Bird Club Member

Joined: Wed Apr 04, 2012 1:35 pm
Posts: 159
Location: Scunthorpe
Can anybody please tell me if the bittern i posted is male or female & how do you tell?
Top
 Profile  
 
Nick Clayton
PostPosted: Thu Nov 07, 2013 11:56 pm 
Offline
Lincs Bird Club Member
Lincs Bird Club Member
User avatar

Joined: Thu Mar 22, 2007 3:11 pm
Posts: 275
Location: Sudbrooke, Lincoln
The sexes are alike Andy

_________________
www.nickclayton.net
www.nickclayton.co.uk
Top
 Profile  
 
John Clarkson
PostPosted: Fri Nov 08, 2013 10:38 am 
Offline
North Lincs Bird Recorder
North Lincs Bird Recorder
User avatar

Joined: Thu Dec 30, 2004 5:48 pm
Posts: 1011
Location: Louth
Alike but not identical. There is a considerable size difference; males are bigger on all measurements and in terms of weight the male is on average about 400gm heavier. You'd probably need them side by side to tell though

John

_________________
Lincolnshire Birds https://www.flickr.com/photos/120340949 ... 8078912016
-------------------------------
Image

Contact: recorder_north@lincsbirdclub.co.uk
Top
 Profile  
 
Geoff Williams
PostPosted: Fri Nov 08, 2013 9:35 pm 
Offline
Lincs Bird Club Member
Lincs Bird Club Member

Joined: Mon Jul 04, 2005 7:52 am
Posts: 716
Location: Saltfleet and Tipton, West Mids.
John Clarkson wrote:
Alike but not identical. There is a considerable size difference; males are bigger on all measurements and in terms of weight the male is on average about 400gm heavier. You'd probably need them side by side to tell though

John

From what I've read, the lores are blue on males and grey or greyish on females even on November birds, so I would say that the bird was a male.
Top
 Profile  
 
Nick Clayton
PostPosted: Fri Nov 08, 2013 10:16 pm 
Offline
Lincs Bird Club Member
Lincs Bird Club Member
User avatar

Joined: Thu Mar 22, 2007 3:11 pm
Posts: 275
Location: Sudbrooke, Lincoln
Geoff Williams wrote:
John Clarkson wrote:
Alike but not identical. There is a considerable size difference; males are bigger on all measurements and in terms of weight the male is on average about 400gm heavier. You'd probably need them side by side to tell though

John

From what I've read, the lores are blue on males and grey or greyish on females even on November birds, so I would say that the bird was a male.


I would be interested to know where you read this Geoff, there is no mention of this feature in BWP which I directly quoted on my original reply.

_________________
www.nickclayton.net
www.nickclayton.co.uk
Top
 Profile  
 
Nick Clayton
PostPosted: Fri Nov 08, 2013 11:21 pm 
Offline
Lincs Bird Club Member
Lincs Bird Club Member
User avatar

Joined: Thu Mar 22, 2007 3:11 pm
Posts: 275
Location: Sudbrooke, Lincoln
Nick Clayton wrote:
Geoff Williams wrote:
John Clarkson wrote:
Alike but not identical. There is a considerable size difference; males are bigger on all measurements and in terms of weight the male is on average about 400gm heavier. You'd probably need them side by side to tell though

John

From what I've read, the lores are blue on males and grey or greyish on females even on November birds, so I would say that the bird was a male.


I would be interested to know where you read this Geoff, there is no mention of this feature in BWP which I directly quoted on my original reply.


I have saved you the trouble Geoff see link below but this is a feature only present during the reproductive period (mid-March to June) so not applicable to Andy's photo. http://serwisy.umcs.lublin.pl/marcin.polak/publikacje/Ibis-Biometrics.pdf

_________________
www.nickclayton.net
www.nickclayton.co.uk
Top
 Profile  
 
Geoff Williams
PostPosted: Fri Nov 08, 2013 11:57 pm 
Offline
Lincs Bird Club Member
Lincs Bird Club Member

Joined: Mon Jul 04, 2005 7:52 am
Posts: 716
Location: Saltfleet and Tipton, West Mids.
Nick Clayton wrote:
Nick Clayton wrote:
Geoff Williams wrote:
John Clarkson wrote:
Alike but not identical. There is a considerable size difference; males are bigger on all measurements and in terms of weight the male is on average about 400gm heavier. You'd probably need them side by side to tell though

John

From what I've read, the lores are blue on males and grey or greyish on females even on November birds, so I would say that the bird was a male.


I would be interested to know where you read this Geoff, there is no mention of this feature in BWP which I directly quoted on my original reply.


I have saved you the trouble Geoff see link below but this is a feature only present during the reproductive period (mid-March to June) so not applicable to Andy's photo. http://serwisy.umcs.lublin.pl/marcin.polak/publikacje/Ibis-Biometrics.pdf

I was reading a piece on the RSPB Old Moor and Dearne Valley web page 'A bit about the Bittern' which showed a picture of a Bittern with blue lores dated 1/11/2011, but reading further it says the picture was actually taken in Feb 2013 so it is presumably more a breeding season thing as you say. However looking at Andy's photo I think you can see a hint of blue.
Top
 Profile  
 
Nick Clayton
PostPosted: Sat Nov 09, 2013 12:05 am 
Offline
Lincs Bird Club Member
Lincs Bird Club Member
User avatar

Joined: Thu Mar 22, 2007 3:11 pm
Posts: 275
Location: Sudbrooke, Lincoln
Geoff Williams wrote:
Nick Clayton wrote:
Nick Clayton wrote:
Geoff Williams wrote:
John Clarkson wrote:
Alike but not identical. There is a considerable size difference; males are bigger on all measurements and in terms of weight the male is on average about 400gm heavier. You'd probably need them side by side to tell though

John

From what I've read, the lores are blue on males and grey or greyish on females even on November birds, so I would say that the bird was a male.


I would be interested to know where you read this Geoff, there is no mention of this feature in BWP which I directly quoted on my original reply.


I have saved you the trouble Geoff see link below but this is a feature only present during the reproductive period (mid-March to June) so not applicable to Andy's photo. http://serwisy.umcs.lublin.pl/marcin.polak/publikacje/Ibis-Biometrics.pdf

I was reading a piece on the RSPB Old Moor and Dearne Valley web page 'A bit about the Bittern' which showed a picture of a Bittern with blue lores dated 1/11/2011, but reading further it says the picture was actually taken in Feb 2013 so it is presumably more a breeding season thing as you say. However looking at Andy's photo I think you can see a hint of blue.


http://www.rspb.org.uk/community/placestovisit/dearnevalley/b/dearnevalley-blog/archive/2013/02/25/a-bit-about-the-bitterns.aspx

_________________
www.nickclayton.net
www.nickclayton.co.uk
Top
 Profile  
 
Display posts from previous:  Sort by  
Forum locked This topic is locked, you cannot edit posts or make further replies.  Page 1 of 1
  [ 8 posts ] 

Board index » Lincolnshire Birding » Lincs Bird Chat

All times are UTC [ DST ]

Who is online

Users browsing this forum: No registered users and 3 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group

Fatbirder's Top 1000 Birding Websites