Bruce spanworm 
Brunepisinus 
Bryony Mining Bee 
Bubas bubalus 
Bubastus Hairstreak 
Bubble coral shrimp 
Bubble-gall Tephritid 
Bucculatrix packardella 
Buck moth 
Buckell's Timberline Grasshopper 
Bucranium taurifrons 
Buescher's Neoclides 
Buff arches 
Buff clothes moth 
Buff ermine 
Buff Footman 
Buff-tailed Bumble Bee 
Buff-tip 
Buff-tipped Eucosma 
Buff-tipped Marble 
Buffalo treehopper 
Bulbous Purse Crab 
Bulgarian Stone Grasshopper 
Bull Hydroid Crab