comparative study of real and fictional corbies

Carol Rumens:

There’s a human narrator, but s/he bows out after three lines. Of the two crows, one has a single, though essential, line: “Where sall we gang and dine today?” The other, having reconnoitred the scene already and worked out the feeding strategy, replies in vivid, uncompromising detail. Anthropomorphism of this kind can be justified on the grounds that the invented bird-talk reflects real, observable bird behaviour regarding food, territory and judicious co-operation. 

Really? That’s how the poem can be justified — by objective analysis of “real, observable bird behaviour regarding food, territory and judicious co-operation”? If the behavior of these poetic corbies should prove inconsistent with the most up-to-date ornithological findings, would we have to toss the poem in the dustbin?