Many animals make their homes in landfills, adapting to the living conditions that come along with it. From birds, to rats, raccoons, and even bears; they all feast and make a living in local landfills. Lately, there are many stories in the news around the United States of people abandoning domestic animals, such as cats in landfills. Although scavengers can live off one, cats can not. They have critical limits that make the condtions unlivable (Thetimesnews.com).
As you can imagine, there is tons of food for scavenger animals to feast off of, so none of the species are getting starved due to more aggresive animals. It is very common to see a "food web" present in a landfill; some call it the circle of life. Many ants, worms, and other insects live in them. In warmer climates, reptiles may be present, feeding off of these small insects. The birds eat the insects and reptiles, and larger animals such as raccoons, coyotes, bears, etc, eat small rodents, and insects. When any of these animals die, the insects feast off of the carcus (eHow.com). It is more common for rodents such as rats and mice to be present in inactive landfills than active ones, due to the constant activity and movement.
Thetimesnews.com, Shelter accused of leaving live animals in landfill, December 29, 2010. http://www.thetimesnews.com/articles/leaving-39732-live-pauls.html
Priddy, Brenda, The food web of organisms found in a landfill site. July 23, 2010. http://220.127.116.11/search/srpcache?ei=UTF-8&p=animals+in+landfills&xa=dY7.TjmoTocfr07.x78bKw--%2C1297740225&fr=yfp-t-336&u=http://cc.bingj.com/cache.aspx?q=animals+in+landfills&d=4510931311921613&mkt=en-US&setlang=en-US&w=80d81ec1,56cd6b31&icp=1&.intl=us&sig=pAoV6KruzM_aitU0_FHOCg