Page:American Journal of Psychology Volume 21.djvu/36

26. Often the little female Sparrow dashed in and took food out of the Cowbird's beak in very much the same way as the English Sparrows, in their free life out of doors, may be seen to relieve the Robins of their choice worms.

At the eleventh test the string and wire were removed for the reason that the bird had now come to strike the latch where