In pictures: Life as the Ravenmaster
Be careful

Visitors are warned - but some still get too close to the ravens.

"Some people poke their fingers near their beaks and when they get bitten they complain," says Derrick.

"I tell them they've just failed the first intelligence test," he jokes. "What do they expect?"

Click below for more images
1 2 3 4 5 6 7 8 9 10 11 12