MOTHS http://www.ukmoths.org.uk Site run
by Ian Kimber covering most UK species. Not the easiest site to just
browse but an extensive collection of pictures and information. http://www.piccies.flybywire.org.uk
Not an 'official' site but covers a fair number of moths. Superb photographs.
Also has photos of Dragon/Damselfiles, some Butterflies, weather, etc.
Well worth a look!
WILDFLOWERS http://www.reticule.co.uk/flora/
An identification guide, quite detailed. Choose the things you know
about a wildflower, submit these and up comes a list of possibilities
for you to try.