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| whydah (Vidua); black indigo bird (Vidua funerea, Hypochera purpurascenscens); dusky indigo bird (Vidua funerea, Hypochera purpurascenscens) | |||
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combassou : 12 phrases in 4 subjects |
| Environment | 2 |
| Natural resourses and wildlife conservation | 3 |
| Natural sciences | 2 |
| Ornithology | 5 |