| SL | Common Name | Local Name | Scientific Name | Domain | Kingdom | Phylum | Class | Order | Family | Genus | Species | Sub Species |
| 71 | Black-crowned Night Heron | Waak Charai | Nycticorax nycticorax | Eukaryota | Animalia | Chordata | Aves | Pelecaniformes | Ardeidae | Nycticorax | nycticorax | |
| 72 | Black-headed Ibis | Boga Akuhi Bog | Threskiornis melanocephalus | Eukaryota | Animalia | Chordata | Aves | Pelecaniformes | Threskiornithidae | Threskiornis | melanocephalus | |
| 73 | Black-necked Stork | Telia Hareng | Ephippiorhynchus asiaticus | Eukaryota | Animalia | Chordata | Aves | Ciconiiformes | Ciconiidae | Ephippiorhynchus | asiaticus | |
| 74 | Black-rumped Woodpecker | Baroitoka | Dinopium benghalense | Eukaryota | Animalia | Chordata | Aves | Piciformes | Picidae | Dinopium | benghalense | |
| 75 | Black-tailed Skimmer | Jiya | Orthetrum cancellatum | Eukaryota | Animalia | Arthropoda | Insecta | Odonata | Libellulidae | Orthetrum | cancellatum | |
| 76 | Black-winged Kite | Kiola Deuka Hen | Elanus caeruleus | Eukaryota | Animalia | Chordata | Aves | Accipitriformes | Accipitridae | Elanus | caeruleus | |
| 77 | Blackjamun | Kolajamu | Psidium cumini | Eukaryota | Plantae | Angiosperm | Dicots | Myrtales | Myrtaceae | Psidium | cumini | |
| 78 | Bloch Razorbelly Minnow | Selkona | Salmostoma balookee | Eukaryota | Animalia | Chordata | Pisces | Cypriniformes | Cyprinidae | Salmostoma | balookee | |
| 79 | Blue Panchax | Gharbeki/ Kanpona/ Charbekii | Aplocheilus panchax | Eukaryota | Animalia | Chordata | Pisces | Cyprinodontiformes | Aplocheilidae | Aplocheilus | panchax | |
| 80 | Blue water Lily | Nila Bhet Phul | Nymphaea pubescens | Eukayota | Plantae | Angiosperm | Dicots | Nymphaeales | Nymphaeaceae | Nymphaea | pubescens |