blind bat → snake grass In the dark, I’m as blind as a bat. My boss keeps me as busy as a bee.
I really need to lose a bit of weight, I’m as fat as a pig. A prisoner escaped from jail and was as free as a bird for two weeks.
Zoe is always as gruff as a bear in the morning. I skipped breakfast this morning, however I was as hungry as a wolf by lunch time.
The tourist in fact was a sitting duck for local thieves. He looks honest but in fact he is a snake in the grass.