Modifiers matching sandpiper:

• small,
• larger,
• migrant,

Simple categories matching migrant:

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