Reason to relocate a picnic blanket, maybe

ANTS

Think of tiny, unwelcome guests that might march in a line toward your food, especially on a warm day. They’re known for their teamwork and love of sweets.

This clue plays on a common annoyance at picnics—when ants show up and ruin the spot. The word "relocate" hints at moving the blanket, and "maybe" suggests the reason isn’t always obvious until you notice tiny invaders. "Ants" fits perfectly as both the literal pest and the short, punchy answer the clue is looking for.