common shelduck
A species of waterfowl (Tadorna tadorna). The name is usually written in katakana.
Common shelducks are often seen on tidal flats near the coast.
Katakana spelling is standard for this bird name; usually written in kana.
Kanji spelling exists but is rarely used; the word is normally written in katakana.
The name likely combines 筑紫 (Tsukushi, an old name for Kyushu) and 鴨 (kamo, 'duck'), but the exact derivation is uncertain.