Simple categories matching avian:

• serum,
• host,
• predator,
• virus,
• connection,
• lineage,
• group,
• disease,
• fauna,
• insectivore,
• scavenger,
• cell,
• protein,
• herbivore,
• raptor,
• male,
• prey,

Members with property avian:

• owl,
• raccoon,
• hawk,
• horse,
• cholera,
• tallow,
• chicken,
• caracara,
• fox,
• flycatcher,
• turkey,
• reed_warbler,
• starling,
• crow,
• young_blackbird,
• somatic_cell,
• falcon,
• dog,
• chick,
• black_vulture,
• tuberculosis,
• eagle,
• jay,
• kingfisher,
• canaries,
• merganser,
• swallow,
• raven,
• goshawk,
• harrier,
• avian_pox,
• botulism,
• eastern_equine,
• duck,
• hawaiian,
• kite,
• snowy_owl,
• migratory_bird,
• avian_influenza,
• shrike,
• finch,
• blue,
• liver_cell,
• deer,
• goldeneye,
• loon,
• common_raven,
• bushtit,
• wigeon,
• mink,
• northwestern_crow,
• rabbit,
• taxon,
• red_kite,
• tern,
• pox,
• skunk,
• feather_disease,
• giant_egret,
• cormorant,
• vulture,
• fiscal_shrike,
• buzzard,
• cat,
• eider,
• forest_raven,
• osprey,
• grey_heron,
• downy_woodpecker,
• bald_eagle,
• fish_crow,
• kestrel,
• magpie,
• heron,
• duck_cell,
• nest_type,
• raptor,
• rodent,
• moorhen,
• grouse,
• terrestrial_predator,
• gelatin,
• cooper_hawk,
• psittacosis,
• northern_harrier,
• turkey_serum,
• mammalian_predator,
• fibroblast,
• american_crow,
• condor,
• pigeon,
• raven_claw,
• goose,
• caspian_tern,
• coyote,
• ptilonorhynchidae,
• pelican,
• harrier_hawk,
• avian_adenovirus,
• chicken_serum,
• physiological_difference,
• australasian_harrier,
• bittern,
• pelecaniformes,
• house-finch_disease,
• grackle,
• otter,
• larger_owl,
• egret,
• cattle,
• bird_flu,
• australian_magpie,
• primordial_germ,
• coot,
• pied_crow,