a Example of bait stations made from plastic drink bottles. Holes were cut in the middle of the bottles for placement of a cotton wick to absorb the attractive mixture. White socks covered the bottles and were coated in the attractive (non-toxic or toxic) mixture. b A field technician hanging a 1.5-L bait station in one of the houses in the Malian village. c Male and female mosquitoes feeding on the bait stations. The colour dye is ingested and stains the abdomen of the mosquitoes allowing for easy detection of mosquito feeding.