How does Julian Barnes use imagery in Flaubert's Parrot?

Examples of Imagery:

"Then I saw it. Crouched on top of a high cupboard was another parrot. Also bright green. Also, according to both the gardienne and the label on its perch, the very parrot which Flaubert had borrowed from the Museum of Rouen for the writing of Un coeur simple...How do you compare two parrots, one already idealized by memory and metaphor, the other a squawking intruder?"

"The brown, the black, the reddish bear are not that far from man, from man's cities, man's friendship even. The coloured bears can mostly be tamed. But the white, the polar bear? It doesn't dance for man's pleasure; it doesn't eat berries; it can't be trapped by a weakness for honey."