B

Here is a complete list of all the combos that start with B

Badger = Ground Squirrel + Weasel Bald Rat = Rat + Hippopotamus Banded Newt = Triton + Echinda Basilisk = Lizard + Monitor Lizard Bat = Mouse + Flying Lemur BatMan = Human + Bat Bear = Beaver + Shark Beaver = Rodent + Ant Bed Bug = Bedbug + Cat Bedbug = Ant + Mosquito Bee = Ant + Eagle Beetle = Cockroach + Snail Bilby = Pygmy Mouse + Hare Binturong = Raccoon + Slowpoke BlobFish = Anchovy + Hippopotamus Blue Dart Frog = Frog + Spider Blue Great Dane = Dog + Elephant Blue-ringed Octopus = Octopus + Spider Boa = Snake + Iguana Bombina = Toad + cheetah Booted Eagle = Eagle + Dwarf Brahminy Blindsanke = Snake + Gremlin Brazilian Tapir = Tapir + Bombina Brian (Family Guy)= Dog + Winnie the Pooh Brown Rat = Rat + Cthulu Bugs Bunny = Rabbit + Cuckoo Bullfrog = Toad + Antelope Bunnyball = Hare + White Bear Butterfly = Fly + Swan