Two types of ovitrap jars and two types of paddles were monitored to determine causes of data losses during Aedes aegypti surveillance. In addition, different ovitrap units were compared in field trails to determine their attractiveness to Ae. aegypti oviposition. Black plastic or black grass jars were equally attractive to oviposition whether equipped with fiberboard or velour paper paddles. Fiberboard paddles were more functional because velour paddles were being destroyed by snails and cockroaches. While glass jars often flooded plastic jars easily tipped over by animals. Plastic jars were considered more functional because the material permits modifications such as a drainage hole to prevent flooding, a mouth bar to prevent animals from drinking and easy attachment of stabilization devices.