Rare, old-fashioned word for 'bat'. Modern Japanese almost always uses こうもり.
In old documents, the word 蚊食鳥 sometimes refers to a bat.
Rare kanji spelling for 'bat', literally 'mosquito-eating bird'. The word itself is rare.
Variant spelling with okurigana. Equally rare.
Compound of 蚊 (ka, 'mosquito'), 食い (kui, 'eating'), and 鳥 (tori, 'bird'), literally 'mosquito-eating bird'. The exact historical derivation is uncertain, but it is an old name for bats.