A liquid delivery bait station having two reservoirs (12, 14) and two fluid transfer systems (32, 38) to allow for sequential delivery of two liquids. The liquids are preferably an insect bait-only formulation which is first delivered into an absorbent feeding pad (34) and an insect bait-toxicant formulation which is next delivered to the absorbent pad. This sequential delivery allows flying insects such as yellow jackets to be trained to the station by the bait formulation before they are exposed to the bait-toxicant formulation.