Generate a question that has the following answer: doesnt say for the following movie plot: After people start to die in the small Texas town of Gallup, the prime suspects are bats. The CDC calls in Dr. Sheila Casper (Dina Meyer) and her assistant, Jimmy Sands (Leon Robinson), who are zoologists who specialize in the study of bats, to investigate the situation. Dr. Alexander McCabe (Bob Gunton) is secretive about the situation, but admits that the bats were genetically modified by him to become more intelligent and also omnivorous so they wouldn't be in danger of extinction any longer. Sheila is disgusted by this but it seems that McCabe had the best intentions. Aided by Sheriff Emmett Kimsey (Lou Diamond Phillips) and CDC specialist Dr Tobe Hodge (Carlos Jacott), Sheila and Jimmy begin to search for the nest. The first night they are attacked and manage to capture one and plant a tracking device on it. However, as soon as they let it go, it is killed by the other bats, who knew of the feint. Emmett decides that Gallup needs to be evacuated, and the mayor is told to broadcast a warning to all residents to stay indoors and secure their houses. Unfortunately, no one listens. The bats invade the town and, within minutes, chaos ensues and several people are killed, including Dr. Hodge, who sacrificed himself to save Sheila. The National Guard arrives and begins evacuating the town. They give Sheila and her bat hunters 48 hours before they destroy the town in hopes of killing the bats. Sheila sets up headquarters in the school. The military has promised to center the infrared cameras of a Chromo-B340 satellite on the area around Gallop to help locate the bat roost. Even when the roost is located, however, how are they going to annihilate every last bat? From the numbers they saw the other night, there are thousands of them. Bombing the roost will only scatter them, leading to the creation of other roosts and potentiating the problem. Poisoning them is not an option, as the most popular bat poison is only marginally effective against bats but highly lethal to humans. Sheila thinks the best solution is to...
A:
What have the two flying foxes begun feeding on?