How does Martin Espada use imagery in Colibri?

"Colibrí" effectively portrays a picture of Taino oppression through its use of concrete imagery. Such imagery describes the world through the five senses. Espada's imagery is primarily visual, although he also includes aural (auditory) and kinesthetic (touch) imagery as well. Examples of visual imagery include the phrases, "fleet of green canoes," "multiple green fingers," and "rock carvings / of eyes and mouths."