Possible Clues:

• Yellow pigment
• Yellow ducks, for example, seen around marsh
• A yellow gum resin, used as a pigment and in medicine
• Is, by the sound of it, the pig meant to have a mob in the egg back there?
• Colour Marsh brought into sport
• Gum resin, yellowish pigment
• Yellow animals getting shot at round marshy area
• Hunted creatures around the swamp are yellow
• Strong yellow colour
• Yellow ducks and drakes perhaps crossing marsh