Modifiers matching thrush:

• migrant,
• mimic,
• larger,

Simple categories matching migrant:

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