what does Bufo boreas mean?

BUFO BOREAS as NOUN

Meaning
- of a great variety of habitats from southern Alaska to Baja California west of the Rockies
Synonym(s)
- western toad (what does western toad mean?)
Hypernyms(s) Bufo boreas is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- true toad (what does true toad mean?)