The site was identified as internationally important for bird conservation in 2003 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
| Year |
Protected Area |
Designation (management category) |
% coverage of IBA |
| 2007 |
Tuhu hoiuala (Pärnu)
|
Hoiuala (VI) |
1 |
| 2007 |
Lihula hoiuala
|
Hoiuala (VI) |
1 |
| 2009 |
Avaste LKA, Mangu skv.
|
Looduskaitseala looduslik sihtkaitsevöönd (Ib) |
1 |
| 2009 |
Avaste LKA, Parasmaa skv.
|
Looduskaitseala hooldatav sihtkaitsevöönd (IV) |
1 |
| 2009 |
Avaste LKA, Soontagana skv.
|
Looduskaitseala hooldatav sihtkaitsevöönd (V) |
<1 |
| 2016 |
Lihula MKA, Lihula pv.
|
Maastikukaitseala piiranguvöönd (V) |
30 |
| 2016 |
Lihula MKA, Lihula skv.
|
Maastikukaitseala hooldatav sihtkaitsevöönd (IV) |
3 |
| 2017 |
Avaste LKA, Avaste soo skv.
|
Wilderness conservation zone of nature reserve (Ib) |
24 |
| 2017 |
Avaste LKA, Kesu skv.
|
Wilderness conservation zone of nature reserve (Ib) |
17 |
| 2017 |
Avaste LKA, Kojastu skv.
|
Wilderness conservation zone of nature reserve (Ib) |
<1 |
| 2017 |
Avaste LKA, Sõõrike pv.
|
Limited management zone of nature reserve (VI) |
<1 |
| 2017 |
Avaste LKA, Parasmaa pv.
|
Limited management zone of nature reserve (VI) |
<1 |
