A small animal trap of a type which can be economically produced and is constructed so that the user can discard it with the captured animal without any exposure to the animal. The trap is in the form of a thin-walled enclosure of resilient plastic with a door flap being formed in the surrounding wall by slits with a portion of the wall adjacent the wall being integrally attached to the door flap so that the resiliency of the plastic allows the door to be bent inwardly to an animal admitting condition but is normally biased to a closed condition in which it is flush with the surrounding wall. The trip member, which may be made separate to the enclosure, is provided for holding the door flap in the open condition and is connected to the door flap or wall in a manner to readily become disconnected if it is slightly moved by an animal entering or by the animal's activities within the enclosure. The entire enclosure, including the door flap can be molded as an integral unit in a single plastic molding step, and the form of the trip member, which may be a second molded part of the trap, can be of a simple form and constructed so as to permit the user to install it when setting the trap.

A modular trapping system that functions in a holding or a terminating mode on dry land, adjacent water or in water. The system comprises several interchangeable, user selectable components that may be conveniently assembled into a desired trap configuration in a minimal time period. The primary components are a cylindrical body with a tapered end, an entrance, and a terminus. In the preferred embodiments, the entrance and terminus may be threadably secured to the body. The entrance components generally comprise a hollow elongated tubular frame supporting a door controlled by a conventional actuating mechanism. The terminus components comprise a hollow elongated tubular frame with a transparent end wall. Several optional inserts may be placed inside the body to enhance the trap. An optional stand may also be used to place the trap adjacent or in bodies of water. The configured trap may be deployed in either a holding or extermination mode. In the holding mode, target animals are held in the interior after entering the trap. In the extermination mode, the target animals are exterminated after entering the trap. When the system is used adjacent a body of water or in the water, the water may be used advantageously. Alternatively, water may be stored internally in the annulus and released appropriately for extermination purposes.