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Here are a couple of shots from a visit to Taronga Zoo.

C&C greatly appreciated
Cheers Andy

<a href="http://www.flickr.com/photos/7197835@N08/2168970190/" title="lion adjusted 2477 by viperagv, on Flickr"><img src="http://farm3.static.flickr.com/2081/2168970190_2197906fbe.jpg" width="333" height="500" alt="lion adjusted 2477" /></a>.jpg

<a href="http://www.flickr.com/photos/7197835@N08/2168102171/" title="Gorilla adjusted 2380 by viperagv, on Flickr"><img src="http://farm3.static.flickr.com/2109/2168102171_83afabaabc.jpg" width="333" height="500" alt="Gorilla adjusted 2380" /></a>.jpg

<a href="http://www.flickr.com/photos/7197835@N08/2168140137/" title="lion adjusted 2418 by viperagv, on Flickr"><img src="http://farm3.static.flickr.com/2103/2168140137_17edb6fcba.jpg" width="500" height="333" alt="lion adjusted 2418" /></a>.jpg

Nice lighting in #1.
In 2 & 3 your WB may be a touch too cool, with the Blueish tone in both these?

I agree with Marc that:

In 2 & 3 your WB may be a touch too cool, with the Blueish tone in both these?

Perhaps you can increase the colour temperature in 2 & 3 or adjust the B&W in your RAW files.