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| blongios nain (Ixobrychus minutus); butor blongios (Ixobrychus minutus) | |||
| blongios de Schrenk (Ixobrychus eurhythmus); blongios nain (Ixobrychus minutus); butor blongios (Ixobrychus minutus); héron blongios (Ixobrychus minutus) | |||
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| petit blongios (Ixobrychus exilis) | |||
| blongios d'Amérique (Ixobrychus exilis); petit butor (Ixobrychus exilis) | |||
| little bittern: 4 phrases in 2 subjects |
| Natural resourses and wildlife conservation | 2 |
| Ornithology | 2 |