Modifiers matching insectivore:

• smaller,
• terrestrial,
• mammalian,
• flying,
• small,
• native,
• avian,
• migrant,
• nocturnal,

Simple categories matching avian:

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