Modifiers matching finch:

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

Simple categories matching migrant:

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