Simple categories matching diurnal:

• fish,
• predator,
• scavenger,
• raptor,
• species,
• reptile,
• prey,
• mammal,
• spawner,
• vertebrate,
• organism,
• animal,
• rodent,
• feeder,
• bird,

Members with property diurnal:

• eagle,
• primates,
• parrotfish,
• lizard,
• bird,
• chaetodon,
• owl,
• goldfish,
• perch,
• harrier,
• hawk,
• rat,
• buzzard,
• marine_mammal,
• jungle_crow,
• turkey,
• reef_fish,
• junco,
• fox,
• vulture,
• raptor,
• monkey_active,
• heron,
• human,
• falcon,
• cardinal,
• allen_hummingbird,
• kite,
• gray_squirrel,
• condor,
• shrike,
• montagu_harrier,
• bald_eagle,
• snake,
• wrasse,
• black_vulture,
• hyena,
• anthropoid,
• duck,
• gyrfalcon,
• domestic_cat,
• parrot,
• dog,
• mammal,
• seagull,
• grosbeak,
• octopus,
• coyote,
• wren,
• whistling_kite,
• surgeonfish,
• northern_harrier,
• squirrel,
• osprey,
• skate,
• pigeon,
• skink,
• towhee,
• pig,
• golden_eagle,
• antelope,
• crow,
• kestrel,
• chick,
• northern_goshawk,
• goldfinch,
• golden_jackal,
• chipmunk,
• raven,
• shark,
• merlin,
• fish,
• robin,
• stork,
• mustelid,
• goshawk,
• booted_eagle,
• bird_human,
• chicken,
• man,
• ray,