What is referred to by 'bird sitting location'?

What is referred to by 'bird bill'? What is associated with: bird brains know the fossils of this early bird were first found in solnhofen bavaria in the 1… Based on the clue 'bird name that completes the simile crazy as a', what is the answer? Based on the clue 'bird similes include spry as a spring chicken pro...', what is the answer? Based on the clue 'bird thatll do in a pinch 5', what is the answer? Based on the clue 'bird thats the bushmans clock in australia', what is the answer? Based on the clue 'bird to which shelley wrote hail to thee blithe sp...', what is the answer? Which performer is associated with 'bird'?