Birds

• Hampshire Ornithological Society (HOS)
• Christchurch Harbour Ornithological Group (CHOG)
  
• Sussex Ornithological Society (SOS)
  
• Berksbirds
  
• Portland Bird Observatory (PBO)
• Surfbirds

Butterflies

• Butterfly Conservation (national)
  
• Hampshire branch (news page)
  

Moths

• Hantsmoths - Mike Wall's superb site
  
• UKMoths

Beetles

• The Coleopterist

Mammals

• The Mammal Society

Plants

Fungi

• Hampshire Fungus Recording Group
• Roger Phillips' site

Websites like this one (or not...)

• Norfolk Birding - Chris Mills' website
• Punkbirder - an irreverent sideswipe at the Norfolk scene
• Peter's Purple Pages - Pete Raby's site from Gosport, Hants
• Hantsbirds - Marcus Ward's page from SW Hampshire
• Hayling Island Birds - and beyond from George Spraggs
• Richard Ford's Digital Wildlife - contains an excellent collection of images.
• A Hampshire Calendar of Birds - Trevor Carpenter's site

General

• UK tide times
  
• Metcheck weather