Join for FREE
It only takes a minute!
More discoveries. NEW: Zeiss Victory SF 32

Welcome to BirdForum.
BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE! You are most welcome to register for an account, which allows you to take part in lively discussions in the forum, post your pictures in the gallery and more.

White-throated Hawk vs variable (Chile)

Reply
 
Thread Tools Rate Thread
Old Friday 11th December 2009, 00:26   #1
njlarsen
Opus Editor
 
njlarsen's Avatar

 
Join Date: Mar 2004
Location: St. James, Barbados
Posts: 23,684
White-throated Hawk vs variable (Chile)

I have just returned from a trip to Chile, and there will be many more questions and confirmations coming, but here is the first one.

I saw a very white hawk in central Chile near some Notophagus forest, in a location (Vilches) where I also saw several Variable hawk. Basically, I only saw the underside, and it was basically similar to the form of variable hawk that has white underside with dark hood except that this bird did not show any signs of the strong black subterminal band on the tail that VH has. The bird I am talking about had a strong secondary bulge and a rather narrow hand; Jaramillo's book states that the trailing edge of the wing is straight in WtH, contra what is shown in the drawing. The bird I saw had darker flight feathers than coverts, and I did not see dark on the sides of the body if it was present (low fly over, from straight ahead, no views from the side).

So the questions are:
Can this observation be explained by variable hawk, does that species show adult-like underside without black tail band?

Can this observation be explained by WTH? Which shape of the wing does this species really have?

thanks
Niels
__________________
Support bird conservation in the Caribbean: BirdCaribbean

Recently moved to Barbados
njlarsen is offline  
Reply With Quote

BF Supporter 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Support BirdForum With A Donation

Old Friday 30th July 2010, 00:32   #2
njlarsen
Opus Editor
 
njlarsen's Avatar

 
Join Date: Mar 2004
Location: St. James, Barbados
Posts: 23,684
I may finally have answered one part of my question, because I found this image of a WtH that clearly shows a secondary bulge and not a straight back edge of the wing.

The Ebird range map for the species shows observations from the area I visited.

The other half of the question still remains: can Variable Hawk occur with whitish underside but lacking black subterminal band on the tail?

Niels
__________________
Support bird conservation in the Caribbean: BirdCaribbean

Recently moved to Barbados
njlarsen is offline  
Reply With Quote

BF Supporter 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Support BirdForum With A Donation

Old Saturday 21st August 2010, 22:53   #3
erizzo
Registered User
 
erizzo's Avatar

 
Join Date: Jul 2004
Location: Oxford
Posts: 414
Hey Niels,
I think you are pretty safe to say that it was a WtH because of it having having the terminal black tail-band. In regards to your second question I don't think I can help you.

Check out my blog and see if you visited any of the places I talk about.
Take care
erizzo is offline  
Reply With Quote
Old Monday 23rd August 2010, 09:47   #4
njlarsen
Opus Editor
 
njlarsen's Avatar

 
Join Date: Mar 2004
Location: St. James, Barbados
Posts: 23,684
Thanks Erik!

That name sounds very nordic?

Niels
__________________
Support bird conservation in the Caribbean: BirdCaribbean

Recently moved to Barbados
njlarsen is offline  
Reply With Quote

BF Supporter 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Support BirdForum With A Donation

Old Tuesday 24th August 2010, 02:06   #5
erizzo
Registered User
 
erizzo's Avatar

 
Join Date: Jul 2004
Location: Oxford
Posts: 414
Hey Neils,
Yeah the last name is Norwegian.
Take care
erizzo is offline  
Reply With Quote
Advertisement
Reply


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
White Throated Sparrow? JMomOhio Bird Identification Q&A 21 Thursday 5th November 2009 23:08
White-throated sparrow lilindigo61 Birds & Birding 3 Sunday 11th May 2008 21:37
Red Tailed Hawk? Chile DGRW Bird Identification Q&A 7 Thursday 28th June 2007 21:18
White-throated Sparrows billhiltonjr Birds & Birding 2 Saturday 18th November 2006 22:58
Here is a White Throated Sparrow HessNest Garden Birds, Bird Feeding & Nestboxes 2 Friday 30th April 2004 02:39



Fatbirder's Top 1000 Birding Websites

Help support BirdForum

Page generated in 0.15924811 seconds with 19 queries
All times are GMT. The time now is 00:22.