The following are an eclectic list of websites that I found useful while planning my travels:
The Jungle Grapevine: the ongoing blog by Ravi Corea, founder of SLWCS.
Elephant Family: a conservation charity aimed at protecting the Asian elephant.
Field Ornithology Group of Sri Lanka: for the twitchers and photographers.
Global Vision International: this company will match you to your ideal overseas volunteer placement.
Lonely Planet: the indispensable travelling companion!
The Millenium Elephant Foundation: an elephant transit home based near Kandy.
Pinnewala Elephant Orphanage: an elephant orphanage based near Kandy.
Ranweli Holiday Village: an eco-friendly resort ideally placed for bird-watching, lizard-watching, butterfly-watching...
Sri Lankan High Commission: the High Commission in London.
Sri Lanka Tourism: a portal site to the tourist boards of Sri Lanka.
Sri Lankan Wildlife Conservation Society: the organisation I will be volunteering with at Wasgamuwa.