Science magazines
- Black-capped Vireo
- Black-footed Ferret
- Black-spored Quillwort
- Blackburn's Sphinx Moth
- Blackside Dace
- Bliss Rapids Snail
- Blowout Penstemon
- Blue Ridge Goldenrod
- Blue Shiner
- Blue-tailed Mole Skink
- Bluemask Darter
- Blunt-nosed Leopard Lizard
- Bog Turtle
- Bolson Tortoise
- Bonamia Menziesii
- Bone Cave Harvestman
- Bonytail Chub
- Borax Lake Chub
- Boulder Darter
- Bradshaw's Lomatium