brown bear
Refers specifically to the brown bear (Ursus arctos), native to Hokkaido in Japan.
In Hokkaido, you need to be careful of brown bears.
ヒグマは雑食性の大型哺乳類です。
The brown bear is a large omnivorous mammal.
Kodiak bear; Alaskan brown bear
Kodiak bear
Usually written in katakana; usually written in kana.
Rare kanji form; not commonly used.
Hiragana spelling, also acceptable.
The reading ひぐま is a compound of ひ (likely from 火 'fire', referring to the brownish color) and くま 'bear'. The kanji 羆 is a specific character for brown bear, but its origin is uncertain.