Dictionary / Vocabulary / 罠にかかる
わなにかかる
to be caught in a trap (snare, etc.); to fall for (a trick, ambush, etc.)
Also written 罠に掛かる
クモはそこで、チョウとかトンボといった小さな昆虫が罠にかかるのを待つ。
There the spider waits for small insects like butterflies and dragonflies to be trapped.