Wood ants also are known as mound ants or field ants which have a unique self-defence mechanism when they feel threatened they shoot formic acid from their abdomens which doesn’t hurt but it would; if one has an open wound, though these acid fumes will cause irritation resulting in coughing and choking. Formic acid is also secreted when ants bite which is the reason behind the pain/sting sensation by an ant bite. Credits: BBC #Ants #DefenceMechanism #AnimalBehaviour #Wildlife | Dr. PM Dhakate