How do termite soldiers defend their colonies from predators?

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Learn how termites use salivary secretions to cement debris to decaying wood nests in their rainforest habitat — termite A termite nest in a tropical rainforest.

Termite soldiers defend their colonies primarily against predators like ants using specialized physical and chemical mechanisms.1

Physical Defenses

Most soldiers possess large, hardened heads and powerful, often hooked mandibles. They use these to perform rapid, scissorlike lunging movements to behead, dismember, or grip attackers. Some species, such as Capritermes, utilize asymmetrical mandibles that lock together and snap with a loud click to strike foes. Additionally, certain species like Cryptotermes employ phragmotic defense, using their truncated heads to physically plug nest entrance holes.1

Chemical Defenses

Higher termites (Termitidae) often supplement or replace physical combat with chemical secretions.1
* Sticky Entanglement: Soldiers may eject sticky, potentially toxic liquids from salivary or frontal glands that harden upon contact with air, entangling enemies.1
* Repellents: Some species, such as the minor soldier of Rhinotermes, secrete liquids that volatilize into repellent gases.1
* Nasute Snouts: In the subfamily Nasutitermitinae, soldiers have evolved a snout-like projection (nasus) through which they can accurately spray a sticky, resinous liquid at predators from a distance.1