Blue-capped cordon-bleu 
Blue-capped manakin 
Blue-capped tanager 
Blue-cheeked Amazon 
Blue-cheeked Bee-Eater 
Blue-cheeked butterflyfish 
Blue-chested hummingbird 
Blue-chinned sapphire 
Blue-crested Lizard 
Blue-crowned hanging parrot 
Blue-crowned Trogon 
Blue-eared Kingfisher 
Blue-eyed Angle-headed Dragon 
Blue-eyed Anole 
Blue-eyed black lemur 
Blue-faced Honeyeater 
Blue-faced malkoha 
Blue-faced parrotfinch 
Blue-footed Booby 
Blue-fronted Amazon 
Blue-fronted lancebill 
Blue-fronted redstart 
Blue-girdled angelfish 
Blue-gray Gnatcatcher