File:Ears of ground squirrels of California f. 01.png
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English: Ears of ground squirrels to show characters of size and shape in different species, a, California Ground Squirrel (Spermophilus beecheyi beecheyi); b, Fisher Ground Squirrel (Spermophilus beecheyi fisheri); c, Oregon Ground Squirrel (Spermophilus beldingi oregonus); d, Stephens Soft-haired Ground Squirrel (Spermophilus mollis stephensi); e, Mohave Ground Squirrel (Spermophilus mohavensis);, Yuma Round-tailed Ground Squirrel (Spermophilus tereticaudus tereticaudus); g, Sierra Golden-mantled Ground Squirrel (Callospermophilus lateralis chrysodeirus); h, Desert Antelope Ground Squirrel (Ammospermophilus leucurus leucurus). All natural size and drawn direct from specimens. Note: a and b are extreme examples ; the average difference existing between the California and the Fisher ground squirrels is much less; individuals of each race can be found which will overlap some individuals of the other in size and shape. |
| Date | |
| Source |
Joseph Grinnell and Joseph Dixon Natural History of the Ground Squirrels of California 1918  |
| Author | Joseph Grinnell and Joseph Dixon |
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. 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. |
| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
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| current | 06:50, 20 May 2015 | | 1,760 × 982 (482 KB) | Animalparty (talk | contribs) | =={{int:filedesc}}== {{Information |description={{en|1=Ears of ground squirrels to show characters of size and shape in different species, a, California Ground Squirrel (''Spermophilus beecheyi beecheyi'') ; b, Fisher Ground Squirrel (''Spermophilus be... |
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