scavenger

Animals or insects whose food source is exclusively or partially the carcasses of dead animals, garbage, or other food sources that have been overlooked by, or are undesirable to, other creatures.

Photo Credit

 
"Common Ravens in the Petrified Forest National Park, Arizona" by Jon Sullivan is licensed under Public Domain.

Manuscript Occurrences
Published Works
References

 
Encyclopædia Britannica Online
     N.d.   Scavenger. http://www.britannica.com/EBchecked/topic/526840/scavenger, accessed
         October 24, 2014.