Bagodares sturnularia 
Bahia Scarlet Tarantula 
Bahiopsis parishii 
Baiaplecta lowi 
Baikal Teal 
Baird's Flycatcher 
Baird's sandpiper 
Bairds Sparrow 
Baird’s Tapir 
Baja California Brush Lizard 
Baja California Collared Lizard 
Baja Spurge 
Bakerella poissonii 
Balaana abscondita 
Balaana gigantea 
Balacra rubrostriata 
Balcanocerus fitchi 
Balcanocerus provancheri 
Balclutha confluens 
Balclutha impicta 
Balclutha neglecta 
Balcones cave shrimp 
Bald eagle 
Bald uakari