Modifiers matching finch:

• smaller,
• australian,
• beaked,
• small,
• northern,
• migrant,
• rare,
• european,
• migratory,

Simple categories matching migrant:

• finch,
• group,
• bird,
• organization,
• language,
• sparrow,
• shorebird,
• songbird,
• labourer,
• fish,
• sandpiper,
• worker,
• passerine,
• waterbird,
• insectivore,
• thrush,
• population,
• visa,
• warbler,