Modifiers matching bird:

• small,
• abundant,
• polar,
• wild,
• frozen,
• native,
• large,
• typical,
• breeding,
• white,
• walking,
• precocial,
• smaller,
• larger,
• regular,
• auspicious,
• pelagic,
• powerful,
• european,
• outdoor,
• migratory,
• captive,
• flightless,
• unclean,
• unwanted,
• edible,
• exotic,
• local,
• modern,
• estuarine,
• intelligent,
• size,
• domesticated,
• diverse,
• japanese,
• spectacular,
• extinct,
• oceangoing,
• nonnative,
• suburban,
• himalayan,
• amazing,
• canadian,
• curious,
• interior,
• marine,
• bodied,
• young,
• harmless,
• important,
• colourful,
• primordial,
• domestic,
• free,
• mimic,
• dark,
• beautiful,
• vibrant,
• gregarious,
• seasonal,
• level,
• good,
• sick,
• higher,
• sedentary,
• urban,
• resident,
• noisier,
• off,
• clean,
• bully,
• coastal,
• migrant,
• skinned,
• stuffed,
• undesirable,
• rare,
• social,
• distinctive,
• medium,
• handsome,
• indoor,
• feral,
• hollow,
• endemic,
• antarctic,
• highland,
• world,
• popular,
• terrestrial,
• upland,
• inconspicuous,
• finicky,
• pink,
• parrotlike,
• cute,
• special,
• samoan,
• montane,
• gallinaceous,
• herbivorous,
• unusual,
• northern,
• english,
• diurnal,
• soaring,
• rich,
• dependant,
• sized,
• common,
• familiar,
• home,
• mobile,
• flighted,
• undecomposed,
• desired,
• colorful,
• evil,
• lower,
• british,
• fast,
• tiny,
• roasted,
• african,
• primitive,
• riparian,
• passerine,
• nonmigratory,
• black,
• heavier,
• visible,
• cuban,
• fantastic,
• colonial,
• invasive,
• indigenous,
• insectivorous,
• bigger,
• moving,
• kosher,
• agile,
• carnivorous,
• injured,
• whole,
• beaked,
• real,
• immature,
• omnivorous,
• altricial,
• fierce,
• big,
• basal,
• useful,
• high,
• threatened,
• interesting,
• unique,
• everyday,
• heavy,
• magnificent,
• tropical,
• australian,
• strong,
• piscivorous,
• symbolic,
• dead,
• nocturnal,
• jurassic,
• raised,
• majestic,
• transitory,
• maritime,
• tall,
• out,
• flying,
• dominant,
• foreign,
• passive,
• predatory,
• fabulous,
• aggressive,
• arctic,
• weaker,
• susceptible,
• colombian,
• plain,
• noxious,
• raptorial,
• american,
• lightweight,
• elusive,

Simple categories matching flightless:

• invertebrate,
• ratite,
• vertebrate,
• bird,
• seabird,