Caeruleuptychia pilata 
Caesar Greenbottle Fly 
Caio championi 
Caio romulus 
Cairns Birdwing 
Calais speciosus 
Calamia tridens 
Calamobius filum 
Calathus melanocephalus 
Calcodes striatus 
Caldwelliola tharma 
Calichodes subrugata 
Calicnemia carminea 
Calico Pennant 
Calico Pyralid 
Calico Scale 
California Bordered Plant Bug 
California Camel Cricket 
California carpenter bee 
California Darner 
California Glowworm 
California mantis 
California maple aphid 
California pipevine swallowtail