Creatures and Entities

http://www.trueghosttales.com/paranormal/strange-creature-an-entity-in-the-woods/#gsc.tab=0
Strange things have appeared in various shapes & forms throughout history.
http://paranormal.about.com/od/weirdcreaturesmonsters/Weird_Creatures_and_Monsters.htm

http://www.strangescience.net/stmons.htm

Some monsters are predators, by design.
http://daveearley.hubpages.com/hub/Monsters-And-Strange-Creatures-of-The-Earth

http://www.popsci.com/science/article/2013-03/if-earth-were-hosting-alien-species-what-it-would-look

http://desert-shapes.blogspot.ca/2013/03/aliens-creatures-monsters-and-entities.html