This is a brilliant talk by Douglas Adams about a lot of things such as lemurs and kimodo dragons and some of the things he got up to researching his book Last Chance To See (about endangered species.) He is highly entertaining and amusing and he talks a LOT of sense about the world and the environment without being a sap about it, which is key. (It's hard to write about Douglas Adams without being a sap about it. I think the word ledge-bag sums up some of my feelings.)
Check out some quality Adams' quotes here.