Owl stamps from Bulgaria

1. Boreal Owl (Aegolius funereus)

Release date: 1992

2. Tawny Owl (Strix aluco)

Release date: 1992

3. Long-eared Owl (Asio otus)

Release date: 1992

4. Scops Owl (Otus scops)

Release date: 1992

5. Short-eared Owl (Asio flammeus)

Release date: 1992

6. Barn Owl (Tyto alba)

Release date: 1992