Table 1. Protected areas where four or more critically endangered (CR) or endangered (EN) bird species are recorded.
| Reserve Name | Country | Total number of CR or EN bird species recorded in this reserve | Number of CR or EN species recorded only in this reserve |
| Galapagos National Park | Ecuador | 8 | 4 |
| Pedra Talhada Biological Reserve | Brazil | 6 | 0 |
| Gough Island Nature Reserve | Saint Helena | 6 | 1 |
| Munchique National Natural Park | Colombia | 5 | 0 |
| South East Island (Rangatira) Nature Reserve | New Zealand | 5 | 1 |
| Emas National Park | Brazil | 4 | 0 |
| Frei Caneca Private Reserve | Brazil | 4 | 0 |
| Sooretama Biological Reserve | Brazil | 4 | 0 |
| Sierra Nevada de Santa Marta Biosphere Reserve | Colombia | 4 | 1 |
| French Southern and Antarctic Lands | France | 4 | 0 |
| Black River Gorges National Park | Mauritius | 4 | 0 |
| Fiordland National Park | New Zealand | 4 | 0 |
| Mangere Island Nature Reserve | New Zealand | 4 | 0 |
| Mt Canlaon Natural Park | Philippines | 4 | 0 |