| Impact ID | 8761 |
| Impact Type | Other Ecological Benefits |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Mallard ducks and 18 other types of waterfowl eat the seeds of many Najas spp. |
| Reference | 17957 |
| Cost | |
| Location | Rift Valley, Merkaz Sappir, Israel |