AMERICAN NATURALIST Impact Factor
| Year | Impact Factor (IF) | Total Articles | Total Cites |
| 2011 | 4.725 | 168 | 24661 |
| 2010 | 4.736 | 171 | 24538 |
| 2009 | 4.796 | 192 | 23373 |
| 2008 | 4.67 | 190 | 21622 |
| Year | Impact Factor (IF) | Total Articles | Total Cites |
| 2011 | 4.725 | 168 | 24661 |
| 2010 | 4.736 | 171 | 24538 |
| 2009 | 4.796 | 192 | 23373 |
| 2008 | 4.67 | 190 | 21622 |