| |||
| black swan; black swan event | |||
| black swan (Cygnus atratus) | |||
| black swan (Chenopis atrata, Cygnus atratus) | |||
|
cygne noir : 3 phrases in 3 subjects |
| Environment | 1 |
| Natural resourses and wildlife conservation | 1 |
| Ornithology | 1 |
| |||
| black swan; black swan event | |||
| black swan (Cygnus atratus) | |||
| black swan (Chenopis atrata, Cygnus atratus) | |||
|
cygne noir : 3 phrases in 3 subjects |
| Environment | 1 |
| Natural resourses and wildlife conservation | 1 |
| Ornithology | 1 |