Labels:animal | parrot | text | bird | screenshot | beak OCR: Bird Watching A bird's cars are round openings on either side of the head. Dr . Paul Kellogg. Albert R. Brand, and other scientists of Cornell University have made interesting experi- ments to find out what birds hear . They trained some captive English sparrows, starlings, and pigeons to feed from a tray thatwas wired With electricity.