Data Zone
Country/territory: Japan
IBA criteria met: A4i, A4iii (2004)
For more information about IBA criteria, please click here
Area: 970 hectares (9.70 km2)
| IBA conservation status | |||
|---|---|---|---|
| Year of assessment (most recent) | State (condition) | Pressure (threat) | Response (action) |
| 2010 | not assessed | low | low |
| For more information about IBA monitoring, please click here | |||
Site description (2007 baseline)
The lakes are located in the northwest of Yamagata Prefecture. Lake Oyama Shimoike is at the foot of Mt Takadateyama, while Lake Oyama Kamiike is at the foot of Mt Hachimoriyama. Both lakes are farm-ponds used for irrigation surrounded by these mountains. Both lakes attract many swans and wild ducks in winter. The number of Mallards, in particular, counts as many as 60,000 in total, of which 20,000 concentrate in Oyama Kamiike, and 40,000 in Oyama Shimoike.
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lakes Oyama Kamiike and Shimoike (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/lakes-oyama-kamiike-and-shimoike-iba-japan on 26/12/2024.