Some advice from Douglas Adams if you ever meet one:
"Komodo dragons sleep headfirst in large burrows. It is a very, very, very bad idea to even think of pulling its tail."
New Scientist Short Sharp Science blog: The daddy of dragons
Who’s the daddy? That’s the question being asked by zoologists stumped by the birth of four rare Komodo dragons at London Zoo – with no obvious male contender on the scene
UPDATE 29–04–2006: See the Another Chance To See blog with updates on the endangered species featured in the book