Think you are a good observer? Try this test.

Found this link to this video on David Sibley's website. Brilliant:



So much of what we observe is dependent on what we expect to see. The final image has as much to do with us and our brain states, as the external world that generated the first images. Maybe I should call this blog the Bird-filled Cuddesdon Blog, to see if a change in mind-state results in more bird sightings?