A very large photo library of wild life in the UK, or by UK photographers. Most, if not all, of which are properly named in either common name or scientific name.
http://www.wildaboutbritain.co.uk/pictures
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Video references of fighting, facial expression, men, women, children, animal moving, etc...
http://www.referencereference.com
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Large photo collection of birds, along with other nature related themes.
http://mydigitalmind.deviantart.com/gallery
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Image diagram tutorial on how to draw human figure, expression, and animals.
http://majnouna.com/tutorials.html
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Catalog of bone and fossil replicas. Their catalog images are large and detail enough to be good reference. Many types of human skeleton and skulls - some bizarre - and some animals as well - including extinct animals such as sabertooth cat.
http://www.boneclones.com
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