Thanks for you comments. I'm sorry, I usually think everybody have read "The Lord of the Rings", I'm going to explain:
"Ents are a fictional race from J. R. R. Tolkien's fantasy world of Middle-earth. The term Ent in a fantasy context is very different from the Anglo-Saxon word Ent, as the former refers to a humanoid tree. They appear to have been inspired by the talking trees of many of the world's folklores.
The word "Ent" was taken from Anglo-Saxon, where it means "giant". (Tolkien extracted the word from the Anglo-Saxon poetry fragments orþanc enta geweorc = "work of cunning giants" and eald enta geweorc = "old work of giants", which described Roman ruins; see Orthanc). In this sense of the word, Ents are probably the most ubiquitous of all creatures in fantasy and folklore, perhaps second only to dragons. The word Ent as it is historically used can refer to any number of large, roughly humanoid creatures, including, but not limited to, giants, trolls, orcs, and even Grendel from the poem Beowulf." -Wikipedia-