Birds Stamp Thematic on WOPA+
Birds
| Christmas 2021 |
| Issued: 15.10.2021 |
| ›Estonia |
| Exotic Pigeons |
| Issued: 14.10.2021 |
| ›Romania |
| Croatia – Kyrgyzstan Joint Issue - Protected Bird Species |
| Issued: 22.09.2021 |
| ›Croatia |
| Natural Tricolor |
| Issued: 30.08.2021 |
| ›Belgium |
| Experience Nature - Haarzuilens Country Estate |
| Issued: 17.08.2021 |
| ›Netherlands |
| Latvian Birds |
| Issued: 16.07.2021 |
| ›Latvia |
| Europa 2021 - Endangered National Wildlife |
| Issued: 28.05.2021 |
| ›Slovenia |
| Europa 2021 - Endangered National Wildlife |
| Issued: 21.05.2021 |
| ›Montenegro |
| Europa 2021 - The Western Capercaillie |
| Issued: 07.05.2021 |
| ›Slovakia |
| Europa 2021 - Endangered National Wildlife |
| Issued: 07.05.2021 |
| ›Croatia |
| Europa 2021 - Endangered National Wildlife |
| Issued: 07.05.2021 |
| ›Armenia |
| Europa 2021 - Endangered National Wildlife |
| Issued: 06.05.2021 |
| ›Estonia |
| 100th Anniversary of the Estonian Ornithological Society |
| Issued: 29.04.2021 |
| ›Estonia |
| Europa 2021 - Endangered National Wildlife |
| Issued: 26.04.2021 |
| ›Faroe Islands |
| Europa 2021 - Big Grouse |
| Issued: 05.04.2021 |
| ›Bosnia and Herzegovina Mostar |
| Bird of the Year (III) - The Bearded Vulture |
| Issued: 31.03.2021 |
| ›Kyrgyzstan KEP |
| Native Songbirds |
| Issued: 01.03.2021 |
| ›Liechtenstein |
| The Lockdown Birds |
| Issued: 01.03.2021 |
| ›Jersey |
| Guernsey Definitive - Birds |
| Issued: 17.02.2021 |
| ›Guernsey |
| Show Birds |
| Issued: 09.02.2021 |
| ›Isle of Man |
| Delta of Moldova |
| Issued: 03.02.2021 |
| ›Romania |
| Franking Labels - Songbirds |
| Issued: 02.02.2021 |
| ›Aland Islands |