Which of Britain's raptors moves as fast as a Formula One car? Which is the Emperor and which is the priest? Find out in this week's quiz - all about the gory world of Britain's birds of prey.
And, now you can win prizes every week by taking our quiz thanks to new sponsor Sigg. Once you've completed the quiz, you'll get a bonus prize question. Get it right and you could win one of 10 iconic Sigg Swiss Quality 0.6l bottles. Made from one piece of aluminium and with no seams, the Sigg bottle is lightweight and virtually unbreakable. Don't forget to answer the bonus prize question at the end of the quiz!
Click the link in the quiz to submit your answer or email it to firstname.lastname@example.org, with the subject 'Quiz competition w/c 30/09'. Don't forget to include your username!