| SL | Common Name | Local Name | Scientific Name | Domain | Kingdom | Phylum | Class | Order | Family | Genus | Species | Sub Species |
| 31 | Asthma Plant,Garden spurge | Gakhiroti plant | Euphorbia hirta | Eukaryota | Plantae | Angiosperm | Dicots | Malpighiales | Euphorbiaceae | Euphorbia | hirta | |
| 32 | Badis | Dum Vacheli/ Nabat/ Randolnee | Badis badis | Eukaryota | Animalia | Chordata | Pisces | Perciformes | Badidae | Badis | badis | |
| 33 | Balitora Minnow | Psilorhynchus balitora | Eukaryota | Animalia | Chordata | Pisces | Cypriniformes | Psilorhynchidae | Psilorhynchus | balitora | ||
| 34 | Banana | Malbhog kol | Musa assamica | Eukaryota | Plantae | Angiosperm | Monocots | Zingiberales | Musaceae | Musa | assamica | |
| 35 | Banded Gourami | Kholihona | Trichogaster fasciata | Eukaryota | Animalia | Chordata | Actinopterygii | Perchiformes | Osphronemidae | Trichogaster | fasciata | |
| 36 | Bank Myna | Gang Salika | Acridotheres ginginianus | Eukaryota | Animalia | Chordata | Aves | Passeriformes | Sturnidae | Acridotheres | ginginianus | |
| 37 | Banyan tree | Botgos | Ficus benghalensis | Eukaryota | Plantae | Angiosperm | Dicots | Rosales | Moraceae | Ficus | benghalensis | |
| 38 | Bar-headed Goose | Dhritiraj | Anser indicus | Eukaryota | Animalia | Chordata | Aves | Anseriformes | Anatidae | Anser | indicus | |
| 39 | Barca Snakehead | Garaka Cheng | Channa barca | Eukaryota | Animalia | Chordata | Pisces | Perciformes | Channidae | Channa | barca | |
| 40 | Barna Baril | Balisonda | Opsarius barna | Eukaryota | Animalia | Chordata | Pisces | Cypriniformes | Cyprinidae | Opsarius | barna |