She would always tell on Jem and Scout. But later for Jem to find out, Mrs. Dubose was only like this because she was sick. Later when Mrs. Dubose died, Jem learned more about her. She was very courageous and hard working.
In fact, ravens will eat just about anything, including the occasional pickings from garbage cans for the city-dwelling ravens. Their usual diet contains insects, seeds, carrion (meat from the carcasses of animals killed by predators), the eggs and nestlings of other birds, and frogs.
Insects eat plants, fungi, decaying matter, and smaller insects. Spiders eat insects. Birds eat spiders. Birds are eaten by larger predators, primarily mammals. At the center of the food web are the big cats, which would be at the top of the food chain, if one were to view the prey cycle in a linear fashion.