Join for FREE
It only takes a minute!
Zeiss - Always on the lookout for something special – Shop now

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.

Tanzania - Black Tern?

Reply
 
Thread Tools Rate Thread
Old Thursday 12th July 2018, 10:09   #1
Garrett Lau
Registered User
 
Garrett Lau's Avatar

 
Join Date: Feb 2005
Location: S.F. Bay Area, California
Posts: 223
Tanzania - Black Tern?

I photographed this tern at Lake Manyara in Tanzania on June 24. I am thinking that the extent of the black makes it look more like a Black Tern than a White-winged Tern, but Black Tern would be quite rare there. I would appreciate any analysis.
Attached Thumbnails
Click image for larger version

Name:	20180624-0L2A2810.jpg
Views:	82
Size:	105.5 KB
ID:	667974  
Garrett Lau is offline  
Reply With Quote
Old Thursday 12th July 2018, 11:46   #2
MacNara
Registered User
BF Supporter 2018
 
MacNara's Avatar

 
Join Date: May 2005
Location: Nara, Japan
Posts: 2,354
I can't see any reason why it wouldn't be an over-summering White-winged Tern, especially based on just this one photo.
__________________
Animals, birds, people: http://kenyaview.earthworldview.com
MacNara is offline  
Reply With Quote

BF Supporter 2011 2012 2013 2014 2015 2016 2017 2018 Support BirdForum With A Donation

Old Thursday 12th July 2018, 12:37   #3
lou salomon
the birdonist
 
lou salomon's Avatar

 
Join Date: Oct 2004
Location: Stuttgart
Posts: 14,552
it's the dark neckside spot, mac. but like you i see a rather white-winged tern like bill structure in this bird.
__________________
lou
lou salomon is offline  
Reply With Quote
Old Thursday 12th July 2018, 15:12   #4
Garrett Lau
Registered User
 
Garrett Lau's Avatar

 
Join Date: Feb 2005
Location: S.F. Bay Area, California
Posts: 223
OK. Thanks for the replies.
Garrett Lau is offline  
Reply With Quote
Old Thursday 12th July 2018, 15:40   #5
SteveClifton
Registered User

 
Join Date: Nov 2006
Location: N Yorks
Posts: 2,497
The more I look at this bird the more it looks like a 2cy Whiskered Tern to me. Although quite small-billed for Whiskered, it looks fairly deep-based and has a fairly well-developed gonys angle. Furthermore, the head pattern just doesn't fit what I'd expect for typical WWBT, which has lots of clean white on the forehead and behind the 'earphones'.

This bird has too much crown streaking, which extends well down onto the forehead and loral area, leaving just a white supercilium and eye-crescent which is enclosed by subtle grey tones/streaking. Same thing behind the earphones, with subtle streaking linking the solidly dark ear coverts to the well-streaked rear crown and nape.

WWBT should show a much crisper definition between black and white areas, and an even smaller bill.

If you need convincing further, and you have the Lewington/Howell/Russell guide to Rare Birds of North America, compare head patterns on pages 139 and 141. It's a dead-ringer for the young Whiskered upper-left on p141.

Last edited by SteveClifton : Thursday 12th July 2018 at 16:41.
SteveClifton is online now  
Reply With Quote
Old Thursday 12th July 2018, 16:14   #6
Garrett Lau
Registered User
 
Garrett Lau's Avatar

 
Join Date: Feb 2005
Location: S.F. Bay Area, California
Posts: 223
Thanks for the detailed analysis. That's very interesting. FWIW, the only other terns that I could identify in the park that day were Whiskered Terns.
Garrett Lau is offline  
Reply With Quote
Old Thursday 12th July 2018, 17:06   #7
GWB77
Grafham Water Birder

 
Join Date: May 2013
Location: Cambridgeshire
Posts: 365
I think Whiskered Tern too
__________________
Mark
https://twitter.com/GrafhamWBirder
GWB77 is offline  
Reply With Quote
Old Thursday 12th July 2018, 18:43   #8
Tib78
Registered User
 
Tib78's Avatar

 
Join Date: Nov 2008
Location: France
Posts: 3,728
And WWBT does not breed in East Africa...unlike Whiskered, hence a fresh 1st cycle bird in June can only be a Whiskered over there.
Tib78 is offline  
Reply With Quote
Old Thursday 12th July 2018, 19:07   #9
SteveClifton
Registered User

 
Join Date: Nov 2006
Location: N Yorks
Posts: 2,497
Quote:
Originally Posted by Tib78 View Post
And WWBT does not breed in East Africa...unlike Whiskered, hence a fresh 1st cycle bird in June can only be a Whiskered over there.
Ok, I thought perhaps too early for 1st cycle but will go along with that
SteveClifton is online now  
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
Tanzania, Lake Manyara - Tern lvcuer Bird Identification Q&A 1 Saturday 21st October 2017 18:19
Tanzania, April: doubt about a Tern ugolino Bird Identification Q&A 5 Friday 14th December 2012 19:13
Tanzania inland tern George Hogg Bird Identification Q&A 2 Friday 9th March 2012 19:32
Tern, Dar es Salaam, Tanzania Tib78 Bird Identification Q&A 3 Monday 29th August 2011 12:37
American Black Tern -v- Eurasian Black Tern Ronayne88 Bird Identification Q&A 2 Wednesday 19th July 2006 20:32



Fatbirder's Top 1000 Birding Websites

Help support BirdForum

Page generated in 0.15571404 seconds with 22 queries
All times are GMT. The time now is 01:43.