They will eat any human or monster their own size that touches them (except other Mantraps), including corpses thrown at them or Spelunkers attempting to stomp on them from above.
Mantraps move slowly and do not jump or fall off ledges. Having no eyes, they do not directly pursue their prey, so will only kill things that wander into their mouths.
When a Mantrap eats something, the Mantrap will be stunned for a short time as it rests. It does not take damage from being stunned in this way.
Shopkeepers eaten by Mantraps will not be killed, but will simply tear their way out from inside the Mantrap after a short amount of time, killing the plant in the process. This does not cause the Shopkeeper to become angry, but he will remain angry if the Spelunker is already wanted. It is possible to kill the Mantrap while the Shopkeeper is inside, this will NOT cause Shopkeepers to aggro. A Mantrap may also eat a Damsel or Hired Hand when it wanders into a shop. Though this will not cause the Shopkeepers to aggro, this does kill the character it eats
If a Mantrap eats a Fire Frog, it will explode after a few seconds. This can destroy blocks and damage characters.
Mantraps are best avoided rather than attacked, due to the high risk of getting close to them and the long time it takes to kill them without a weapon.
If it is necessary to kill a Mantrap - if it is blocking your path or threatening a Damsel, for example - it is best to do so from a distance with a ranged weapon or a throwable object, like a rock. Thrown corpses will be swallowed and deal no damage, but this will still cause the Mantrap to be stunned long enough to slip past it.
Although they can be sacrificed at an Altar while stunned for a decent amount of favor, this should only be attempted if the Altar is very close (within a few tiles) as the Mantrap's stun period is relatively short. If it wakes up while being carried, it will immediately eat the player carrying it.
Mantraps can be used as a situational weapon against tough enemies such as Cavemen or Green Knights by stunning them and throwing them towards the target. When they awaken, there is a good chance that they will devour the other enemy and allow you to pass safely.
Obviously, the name of the Mantrap is derived from the Venus Flytrap, a well-known carnivorous plant famous for feeding on insects such as flies.
- If the player has the Ankh and a Cape or a Jetpack, being eaten by a mantrap will unequip the Cape or Jetpack after respawning, leaving the item on the ground next to the mantrap.
- It's possible for a Mantrap to eat an enemy and a Spelunker when still doing the eating animation. In fact, Mantraps can eat any number of characters simultaneously.