Wildlife guides

[terrypin]

I do a fair amount of country walking, and reckon it's time I learned to recognise more of what I see. To shortcut a lot of googling and downloading, does anyone know of any concise, illustrated guides covering birds, wild flowers, and trees, in PPC format please? I expect they're LARGE, but I'm prepared to dump some of my WMAs temporarily to get them onto my CF card.

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Terry, West Sussex, UK
Using iPAQ 2210 with WM2003.