These tokens have different meanings depending on where they are placed:
• On the Build Action space (or the Shelter, Roof or Palisade spaces), they remind you that you must assign 1 additional food or wood when you next plan an Action there that requires these resources. The token remains in place until a Build Action succeeds and the additional food or wood is spent.
• On an Island tile with the camp, they provide 1 additional food or wood during the Production Phase, if there is a corresponding non-exhausted source on the tile. The token remains in place.
• On an Island tile (other than the camp), they provide 1 additional food or wood to any Gather Action that gathers the corresponding resource, if there is a corresponding non-exhausted source on the tile. The token remains in place.
• If you place an additional food token on a tile that has no food source because of the New Flock card, it counts as a food source in its own right.