Refers to the fleshy red crest on a rooster's head. Also used figuratively in the idiom トサカにくる (to get angry).
The rooster's comb shone bright red in the morning sun.
He always looks like he's fuming mad.
masked lapwing; masked plover; spur-winged plover
Usually written in katakana; the kanji form 鶏冠 is rare and may be read as けいかん.
Kanji form; can also be read けいかん. Rare in modern usage.
Hiragana spelling, also common.
The origin is uncertain. The kanji 鶏冠 literally means 'chicken crown'.