article_snippet: Lead researcher Dr Clint Penick, from North Carolina State University, said: 'Human foods clearly make up a significant portion of the diet in urban species.
article_snippet: The scientists diet was assessed by analysing the kind of carbon in The scientists bodies.
article_snippet: But the isotope analysis showed no evidence of a human-like diet.
article_snippet: This highlights the complex nature of urban ecosystems and how much we still have to learn about how these species relate to each other and to the environment,' said Dr Penick. '
article_snippet: This could also help we determine which species are doing the most to clean up we trash.