An illustrated reference book (field guide) that shows animals, plants, insects, etc., with pictures and descriptions for identification and study.
子供用の昆虫図鑑を買ってあげた。
I bought a children's insect guide for them.
野鳥の名前を図鑑で調べた。
I looked up the name of the wild bird in a field guide.
図鑑には詳しい説明と写真が載っている。
The illustrated guide contains detailed descriptions and photos.