Disclosed herein is a trap for flying pests that does not require the use of chemicals and can be packaged in such a way that it can be present in public areas without being unsightly or intrusive. The trap is reusable, easy to set up, easy to clean, and easy to operate. An example trap includes a gathering vessel, fluid trap, conduit, vacuum, and timing device. The gathering vessel includes a container to hold attractant bait. One end of the conduit is coupled to the gathering vessel and the other end designed to be submerged within fluid inside the fluid trap. The vacuum is coupled to the fluid trap and removes air from the fluid trap to cause air and flies to flow from the gathering vessel, through the conduit, and into fluid inside the fluid trap. The timing device periodically activates and deactivates the vacuum.
