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Use "boreas" in a sentence
"Amphibians expected in the region include the western toad Bufo boreas, and spotted frog Rana pretiosa, while reptiles are not found this far north."
"There were more than a dozen listed when you arrived, and to these he adds -golden toad, " "Bufo boreas, " -harlequin frog, " -yellow-legged mountain frog, " and "Canadian chorus frog."
"Professor Agassiz describes it in his _Lake Superior_ as _Esox boreas_."