Finally, successful animals in humanized landscapes are often perceived as "cute", at least until they become so numerous that their preferential status becomes diminished. Many wildlife species have the potential of becoming a "nuisance" species, and whether or not a species is regarded as a pest can be directly correlated with the degree to which that animal can be tolerated by humans. For many people, tree squirrels feeding in their yards or gardens are not a problem; a neighbor may feel that these same squirrels nesting in the attic of their house are a nuisance and a fire hazard, due to their habit of gnawing on electrical cables.