Pantanal bird # 1 (1 Viewer)

[rosmo01]

Donacobius atricapilla

What species is this?

Brazilian Pantanal, nesting in thicket by a river.

 

[njlarsen]

I think Donacobius

Niels

 

[Valéry Schollaert]

I think Donacobius

Niels

Agreed

 

[rosmo01]

Donacobius atricapilla does not have white on head nor does the pictured have the yellow iris of atricapilla.

 

[Valéry Schollaert]

It is a juvenile

 

[njlarsen]

Donacobius atricapilla does not have white on head nor does the pictured have the yellow iris of atricapilla.

Juveniles and adults in the SW Brazil does have white in head (according to the Brazil field guide I looked at yesterday - van Perlo).

Niels

 

[rosmo01]

My source is Wildlife Conservation Society's Birds of Brazil - The Pantanal Cerrado of Central Brazil, and it's not mentioning any white, nor a brown iris - it's clear on yellow iris. The same goes for The Birds of Ecuador (vol 2)...
So at what age does the iris turn yellow and the head black?

 

[csanchez7]

Black-capped Donacobius. It is a very young bird. Note the gape line.

Carlos

 

[njlarsen]

The info about white line in all juveniles and in adult of subspecies albovittatus is also found in HBW alive. Compare with http://ibc.lynxeds.com/photo/donacobius-donacobius-atricapilla/juvenile-near-groningen

Niels

 

[njlarsen]

I have just added this info to the opus page for Donacobius

Please upload this image, we do not have a photo of a bird with eye line in the gallery

Niels

 

[rosmo01]

Yes I definitely think you're right regarding Donacobius atricapilla albovittatus! Thanks!

I also saw the lynxeds image, but I didn't notice ssp albovittatus.
Their range overlap, so how to know which is which?

Very interesting there are so few confirmed juvenile photos, and none regarding the yellow iris missing in juves.

Image uploaded.

 

[Fritz73]

From 'Birds of South America Passerines' by Robert S. Ridgely and Guy Tudor:
"In Bolivia has a narrow white postocular streak, as do juveniles throughout range." page 526

 

[rosmo01]

Yet iris is not mentioned.

 

[njlarsen]

Image uploaded.

Thanks Morten,
It now appears in the Opus page for the species http://www.birdforum.net/opus/Black-capped_Donacobius

I would encourage you to also upload to the birdforum gallery

Niels