long-tailed jaeger; long-tailed skua
A seabird species (Stercorarius longicaudus). The name is usually written in katakana.
The long-tailed jaeger is a seabird that breeds in the Arctic.
Standard katakana spelling for this bird name.
Kanji spelling is rare and mostly used in scientific or older texts; the word is usually written in kana.
Compound of 白腹 (white belly), 盗賊 (thief, pirate), and 鴎 (gull), referring to its appearance and piratical behavior of stealing food from other birds.