Misc: On This Day In January 1978 - Howlin' Wolf died following ______ surgery in Chicago.?

Questions

What is a one legged camera support called?

What is the term for the course of training nearly 5000 potential taxi drivers undego in London?

Which fish can kill by electrocution?

Which british theatre has a permanent backdrop of sea and sky?

What is the name for someone who studies bird life?