I posted these in the nature forum, but always like a good critique. your comments and suggestions appreciated. All taken with a D70 and Sigma 50-500 lens, mostly at f/6.3 or f/8.

<img src="http://forums.photographyreview.com/attachment.php?attachmentid=21522&stc=1">
<img src="http://forums.photographyreview.com/attachment.php?attachmentid=21510&stc=1">
<img src="http://forums.photographyreview.com/attachment.php?attachmentid=21491&stc=1">
<img src="http://forums.photographyreview.com/attachment.php?attachmentid=21524&stc=1">

Sigh, I've got to work on my bird photography. I particularly like the first and the last of these four. The vulture is pretty cool but a bit blurry and dark (even for a vulture).

What is the last bird (if its identified in the Nature Forum I'll find it eventually). I'm sure it's not but it looks a bit like (to my untrained eye) a Curasow.

Glad to see these.

I like the first one. Great framing on it, and so sharp you can count the feathers, and see the pupils. Good job..