The excerpt provided is a figurative language which makes use figures of speech to achieve impact, persuasion and emphasis.
Alliteration, Hyperbole, Metaphor and Simile as all examples of figures of speech.
Alliteration: places a number of words with similar consonant sounds to occur next to each other in a series etc. For example: A big bully beats a baby boy.
Hyperbole: exaggerates on ideas to emphasis a situation. For example: She has been dying to get a new shoe.
Metaphor: makes use of a hidden comparison between two different things, two things that have nothing in common but at the same time share same characteristics. For example: The news was music to my ears.
Simile: makes direct comparisons between two unrelated things, by using the words "like" and "as". For example: She is as large as life.
The excerpt provided there is no comparison but an exaggeration of facts as ostriches are said to gobble their food