ywaihung

3-11-2020
Mai Po

IMG-20201104-WA0010.jpg (381.8 KB)

7/11/2020 09:33

thomaslegg

I'm probably the last person to ask for an ID, but looks like a classic Dusky Warbler.

There are 2 confusion species (things that look a lot like this), the less common Radde's Warbler and the one or so a year on migration Yellow-Streaked Warbler. Usually they are IDd by how common they are and call.

The guidebooks focus on the "eyebrow" (supercillium), which in your bird's case shows the classic more white in front of the eye and a bit creamier behind the eye.

You'd have to ask the ringers and the folks who own the new ringing book about my second ID point. I haven't looked at Radde's Warbler wings to see if there is a difference, but Dusky Warbler look to have primaries (the group of long feathers to the outside of the wing) which are shorter than the secondaries (the group of long feathers above the the primaries) and your bird fits this perfectly.

ywaihung

Thank you for your help.

badesc

Quote:

Original posted by thomaslegg at 8/11/2020 11:34
I'm probably the last person to ask for an ID, but looks like a classic Dusky Warbler.

There are 2 confusion species (things that look a lot like this), the less common Radde's Warbler and the one or ...

Primaries are generally longer than secondaries, hence the primary-projection visible on a folded wing. This is the case in most warblers, and visible on this photo.

To my knowledge, the length of the primaries or the primary-projection are not useful characters to separate Dusky from Radde's in the field.

[ Last edited by badesc at 9/11/2020 17:38 ]

thomaslegg

Quote:

Primaries are generally longer than secondaries, hence the primary-projection visible on a folded wing. This is the case in most warblers, and visible on this photo.

To my knowledge, the length of  ...

Readjusts Dunce Cap. Would love to use strikethrough font on previous post to ensure no one else follows my advice but not available.

badesc

No worries!

Maybe this might be of some help:
https://youtu.be/2BGDFNvAeUc
https://youtu.be/GFCgwglikcY