noun
gyrfalcon
A large falcon of the Arctic, Falco rusticolus. In Japanese, typically written in katakana as シロハヤブサ.
シロハヤブサは北極圏に生息する大型のハヤブサです。
The gyrfalcon is a large falcon that lives in the Arctic region.
ハヤブサ is the peregrine falcon, a smaller and more widespread species. シロハヤブサ is specifically the gyrfalcon, distinguished by its larger size and Arctic habitat.
Compound of 白 (しろ, 'white') + ハヤブサ (はやぶさ, 'falcon'), referring to the pale plumage of the gyrfalcon.