| Impact ID | 5727 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | White-banded tree frog (Hypsiboas albomarginatus) shifted their calls to a significantly higher frequency when in the presence of American bullfrog (Lithobates catesbeianus). |
| Reference | 40121 |
| Cost | |
| Location | Serra do Itajai´ National Park, Blumenau, Brazi |