A trap (2) for animal pests (4), which trap (2) comprises a housing (6), an entrance (8) to the housing (6), a passage (10) in the housing (6), at least one penetrator means (12) for entering an animal pest (4) and reset means (14), the trap (2) being such that movement of the animal pest (4) in the passage (10) causes the penetrator means (12) to move from a first position in which the penetrator means (12) is ready to enter the animal pest (4) to a second position in which the penetrator means (12) enters the animal pest (4), and the reset means (14) being such that it causes the penetrator means (12) to move from the second position to the first position consequent upon movement of the animal pest as the animal pest exits the trap (2), whereby the trap (2) is automatically reset for use with another animal pest (4).
