File:American Journal of Psychology (Volume 21) Fig 8.jpg
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Summary
| Description |
English: The female Cowbird as she opened the door with the beak. This is a very simple way of opening the door. As a rule the male English Sparrow made many attempts before the Cowbird left the perch. |
| Date | |
| Source | https://en.wikisource.org/wiki/Page:American_Journal_of_Psychology_Volume_21.djvu/31 |
| Author | Editor G. Stanley Hall |
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 21:19, 23 June 2021 | | 1,511 × 1,029 (1.36 MB) | Sp1nd01 | Uploaded a work by Editor G. Stanley Hall from https://en.wikisource.org/wiki/Page:American_Journal_of_Psychology_Volume_21.djvu/31 with UploadWizard |
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