A bait trap generally for crawling insects, such as ants, cockroaches, silverfish, etc., having a bottom sheet and a top sheet attached to one another in a leak-tight manner at their respective edges forming an enclosure for holding bait, and at least one inlet communicating with the enclosure and sized so that the target insect can access the enclosure and reach the bait. The bottom and top sheets also form a bait reservoir connected with the enclosure through an initially obstructed passage suitable for being opened and allowing transferring bait from the reservoir to the enclosure in response to a pressure increase in the reservoir as the reservoir is being pressed using one's fingers.
