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        Discussion Area 討論區 >> Bird Identification 鳥類辨識 >>  Unsure Shrike on Lamma
        
(Message started by: Neil on Sep 24^th, 2006, 9:06pm)

Title: Unsure Shrike on Lamma
Post by Neil on Sep 24^th, 2006, 9:06pm

Seen yesterday in the farmland on Lamma. I guess a juvenile Long-Tailed Shrike but the markings seem indistinct. Help! Neil.

Lamma Island,
Hong Kong,
China.

23/09/06

Olympus 7070wz plus Swarovski STS80HD scope and 30x eyepiece and DCA adatper

http://www.pbase.com/neilfif11/image/67410454.jpg

Title: Re: Unsure Shrike on Lamma
Post by miket on Sep 24^th, 2006, 9:20pm

This is juvenile Brown Shrike, Neil.

Mike Turnbull

Title: Re: Unsure Shrike on Lamma
Post by Paul Leader on Sep 25^th, 2006, 9:42am

Surely it is a first-winter. Whilst it has retained juvenile greater coverts it has clearly moulted all the body feathers, i.e. it has completed its post juvenile moult.

Title: Re: Unsure Shrike on Lamma
Post by miket on Sep 25^th, 2006, 11:18am

Yes, Paul. I thought about that shortly after I posted, and specifically when what it is presumably a bird in juvenile plumage was posted elsewhere (in fact by Owen in the photo gallery).

I'd be interested to read your opinion on the age (and identity) of that bird (though if it's not a juvenile Brown Shrike I'm seriously confused).

Mike

Title: Re: Unsure Shrike on Lamma
Post by Paul Leader on Sep 25^th, 2006, 11:26am

I agree, that bird is a juvenile. In fact, if it was photgraphed by the school, I had good but brief views yesterday, which I suspected (as is, I think, confirmed by the photos) was a juvenile cristatus Brown Shrike (due to rich brown colour to the upperparts).

Anyhow, it has moulted none of the juvenile plumage, compare for example the retained juvenile upperparts, median coverts, primary coverts etc. with the Lamma bird.

Note also the difference in the ground colour of the Lamma bird (a first winter lucionensis) and the Po Toi bird (nominate cristatus).

Title: Re: Unsure Shrike on Lamma
Post by miket on Sep 25^th, 2006, 1:47pm

Thanks, Paul.

Subspecific identity of the Po Toi bird - which unfortunately I didn't see - as cristatus, certainly makes sense and explains its almost Tiger Shrike tone and intensity, while clearly having dark through the eye and a less deep bill than Tiger.

Mike.